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    <us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Description of Business&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We are a biopharmaceutical company focused on&#13;the acquisition, development and commercialization of novel treatments for B-cell malignancies and autoimmune diseases. Currently,&#13;the Company is developing two therapies targeting hematologic malignancies. TG-1101 (ublituximab) is a novel, glycoengineered&#13;monoclonal antibody that targets a specific and unique epitope on the CD20 antigen found on mature B-lymphocytes. We are also&#13;developing TGR-1202, an orally available PI3K delta inhibitor. The delta isoform of PI3K is strongly expressed in cells of hematopoietic&#13;origin and is believed to be important in the proliferation and survival of B-lymphocytes. Both TG-1101 and TGR-1202 are in clinical&#13;development for patients with hematologic malignancies. The Company also has pre-clinical programs to develop IRAK4 (interleukin-1&#13;receptor-associated kinase 4) inhibitors, BET (Bromodomain and Extra Terminal) inhibitors, and anti-PD-L1 and anti-GITR antibodies.&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We also actively evaluate complementary products,&#13;technologies and companies for in-licensing, partnership, acquisition and/or investment opportunities. To date, we have not received&#13;approval for the sale of any of our drug candidates in any market and, therefore, have not generated any product sales from our&#13;drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The accompanying unaudited condensed consolidated&#13;financial statements were prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial&#13;information and with the instructions to Quarterly Report on Form 10-Q and Article&amp;#160;10 of Regulation&amp;#160;S-X of the Exchange&#13;Act. Accordingly, they may not include all of the information and footnotes required by GAAP for complete financial statements.&#13;All adjustments that are, in the opinion of management, of a normal recurring nature and are necessary for a fair presentation&#13;of the condensed consolidated financial statements have been included. Nevertheless, these condensed consolidated financial statements&#13;should be read in conjunction with the audited consolidated financial statements contained in our Annual Report on Form 10-K for&#13;the year ended December 31, 2015. The accompanying condensed December 31, 2015 balance sheet has been derived from these statements.&#13;The results of operations for the three and six months ended June 30, 2016 are not necessarily indicative of the results that may&#13;be expected for the entire fiscal year or any other interim period.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Liquidity and Capital Resources&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We have incurred operating losses since our inception&#13;and expect to continue to incur operating losses for the foreseeable future and, may never become profitable. As of June 30, 2016,&#13;we have an accumulated deficit of approximately $187.9 million.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our major sources of cash have been proceeds&#13;from the private placement and public offering of equity securities. We have not yet commercialized any of our drug candidates&#13;and cannot be sure if we will ever be able to do so. Even if we commercialize one or more of our drug candidates, we may not become&#13;profitable. Our ability to achieve profitability depends on many factors, including our ability to obtain regulatory approval for&#13;our drug candidates; successfully completing any post-approval regulatory obligations; and successfully commercializing our drug&#13;candidates alone or in partnership. We may continue to incur substantial operating losses even if we begin to generate revenues&#13;from our drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;As of June 30, 2016, we had approximately&#13;$75.8 million in cash, cash equivalents, investment securities, and interest receivable. We anticipate that our cash and cash&#13;equivalents and investments will be sufficient to fund our anticipated operating cash requirements for approximately 18  to&#13;24 months from June 30, 2016. The actual amount of cash that we will need to operate is subject to many factors, including,&#13;but not limited to, the timing, design and conduct of clinical trials for our drug candidates. We are dependent upon&#13;significant future financing to provide the cash necessary to execute our current strategic plan, including the&#13;commercialization of any of our drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our common stock is listed on the Nasdaq Capital&#13;Market and trades under the symbol &amp;#147;TGTX.&amp;#148;&lt;br clear="all" /&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Recently Issued Accounting Standards&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;In May 2016, the&#13;Financial Accounting Standards Board (&amp;#147;FASB&amp;#148;) issued ASU No. 2016-11, &amp;#147;Rescission of SEC Guidance Because of&#13;Accounting Standards Update 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting&amp;#148;&#13;(&amp;#147;ASU 2016-11&amp;#148;).&amp;#160; ASU 2016-11 rescinds certain SEC guidance from the &lt;i&gt;FASB Accounting Standards&#13;Codification&lt;/i&gt; in response to announcements made by the SEC staff at the Emerging Issues Task Force&amp;#146;s March 3, 2016&#13;meeting.&amp;#160; Specifically, ASU 2016-11 supersedes SEC observer comments on the following topics: &lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Upon the adoption of ASU 2014-09:&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Revenue and expense recognition for freight services in process (ASC 605-20-S99-2)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Accounting for shipping and handling fees and costs (ASC 605-45-S99-1)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Accounting for consideration given by a vendor to a customer (ASC 605-50-S99-1)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Accounting for gas-balancing arrangements (ASC 932-10-S99-5).&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Upon the adoption of ASU 2014-16&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Determining the nature of a host contract related to a hybrid financial instrument issued in the&#13;form of a share under ASC 815 (ASC 815-10-S99-3).&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;ASU 2016-11 is effective upon the adoption of&#13;ASU 2014-09 and ASU 2014-16.&amp;#160; The adoption of ASU 2016-11 is not expected to have a material impact on the Company&amp;#146;s&#13;condensed consolidated financial statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In March 2016, the FASB issued ASU No. 2016-09, &amp;#147;Simplifying the Accounting for Share-Based Payments&amp;#148; (&amp;#147;ASU&#13;2016-09&amp;#148;). ASU 2016-09 simplifies several aspects of the accounting for employee share-based payment transactions for both&#13;public and nonpublic entities, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements,&#13;as well as classification in the statement of cash flows. ASU 2016-09 is effective for annual reporting periods beginning after&#13;December 15, 2016, including interim periods within those annual reporting periods. The provisions of this standard are not expected&#13;to significantly impact the Company.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Other pronouncements issued by the FASB or other&#13;authoritative accounting standards group with future effective dates are either not applicable or not significant to our consolidated&#13;financial statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Use of Estimates&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The preparation of financial statements in conformity&#13;with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the&#13;disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and&#13;expenses during the applicable reporting period. Actual results could differ from those estimates. Such differences could be material&#13;to the consolidated financial statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Cash and Cash Equivalents&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We treat liquid investments with original maturities&#13;of three months or less when purchased as cash and cash equivalents.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Restricted Cash&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We record cash pledged or held in trust as restricted&#13;cash. As of June 30, 2016 and December 31, 2015, we have approximately $0.6 million of restricted cash pledged to secure a line&#13;of credit as a security deposit for an &lt;font style="background-color: white"&gt;Office Agreement &lt;/font&gt;(see Note 8).&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Investment Securities&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Investment securities at June 30, 2016 and December&#13;31, 2015 consist of short-term and long-term government securities. We classify these securities as held-to-maturity. Held-to-maturity&#13;securities are those securities in which we have the ability and intent to hold the security until maturity. Held-to-maturity securities&#13;are recorded at amortized cost, adjusted for the amortization or accretion of premiums or discounts. Premiums and discounts are&#13;amortized or accreted over the life of the related held-to-maturity security as an adjustment to yield using the effective interest&#13;method.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;A decline in the market value of any investment&#13;security below cost, that is deemed to be other than temporary, results in a reduction in the carrying amount to fair value. The&#13;impairment is charged to operations and a new cost basis for the security is established. Other-than-temporary impairment charges&#13;would be included in interest and other (income) expense, net. Dividend and interest income are recognized when earned.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Credit Risk&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Financial instruments that potentially subject&#13;the Company to concentrations of credit risk consist primarily of cash and cash equivalents, short-term investments and long-term&#13;investments. The Company maintains its cash and cash equivalents, short-term investments and long-term investments with high-credit&#13;quality financial institutions. At times, such amounts may exceed federally-insured limits.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Revenue Recognition&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We recognize license revenue in accordance with&#13;the revenue recognition guidance of the FASB Accounting Standards Codification (or &amp;#147;Codification&amp;#148;). We analyze each&#13;element of our licensing agreement to determine the appropriate revenue recognition. The terms of the license agreement may include&#13;payments to us of non-refundable up-front license fees, milestone payments if specified objectives are achieved, and/or royalties&#13;on product sales. We recognize revenue from upfront payments over the period of significant involvement under the related agreements&#13;unless the fee is in exchange for products delivered or services rendered that represent the culmination of a separate earnings&#13;process and no further performance obligation exists under the contract. We recognize milestone payments as revenue upon the achievement&#13;of specified milestones only if (1) the milestone payment is non-refundable, (2) substantive effort is involved in achieving the&#13;milestone, (3) the amount of the milestone is reasonable in relation to the effort expended or the risk associated with achievement&#13;of the milestone, and (4) the milestone is at risk for both parties. If any of these conditions are not met, we defer the milestone&#13;payment and recognize it as revenue over the estimated period of performance under the contract.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Research and Development Costs&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Generally, research and development costs are&#13;expensed as incurred. Non-refundable advance payments for goods or services that will be used or rendered for future research and&#13;development activities are deferred and amortized over the period that the goods are delivered or the related services are performed,&#13;subject to an assessment of recoverability. We make estimates of costs incurred in relation to external clinical research organizations,&#13;or CROs, and clinical site costs. We analyze the progress of clinical trials, including levels of patient enrollment, invoices&#13;received and contracted costs when evaluating the adequacy of the amount expensed and the related prepaid asset and accrued liability.&#13;Significant judgments and estimates must be made and used in determining the accrued liability balance and expense in any accounting&#13;period. We review and accrue CRO expenses and clinical trial study expenses based on work performed and rely upon estimates of&#13;those costs applicable to the stage of completion of a study. Accrued CRO costs are subject to revisions as such trials progress&#13;to completion. Revisions are charged to expense in the period in which the facts that give rise to the revision become known. With&#13;respect to clinical site costs, the financial terms of these agreements are subject to negotiation and vary from contract to contract.&#13;Payments under these contracts may be uneven, and depend on factors such as the achievement of certain events, the successful recruitment&#13;of patients, the completion of portions of the clinical trial or similar conditions. The objective of our policy is to match the&#13;recording of expenses in our financial statements to the actual services received and efforts expended. As such, expense accruals&#13;related to clinical site costs are recognized based on our estimate of the degree of completion of the event or events specified&#13;in the specific clinical study or trial contract.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Prepaid research and development in our consolidated&#13;balance sheets includes, among other things, certain costs related to development and manufacturing services. These development&#13;and manufacturing agreements often require payments in advance of services performed or goods received. Accordingly, as of June&#13;30, 2016 and December 31, 2015, we recorded approximately $14.5 million and $9.2 million of prepaid development and manufacturing&#13;services, respectively, in prepaid research and development related to such advance agreements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Income Taxes&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Income taxes are accounted for under the asset&#13;and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary&#13;differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases,&#13;operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected&#13;to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect&#13;on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment&#13;date. If the likelihood of realizing the deferred tax assets or liability is less than &amp;#147;more likely than not,&amp;#148; a valuation&#13;allowance is then created.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We, and our subsidiaries, file income tax returns&#13;in the U.S. Federal jurisdiction and in various states. We have tax net operating loss carryforwards that are subject to examination&#13;for a number of years beyond the year in which they were generated for tax purposes. Since a portion of these net operating loss&#13;carryforwards may be utilized in the future, many of these net operating loss carryforwards will remain subject to examination.&#13;We recognize interest and penalties, if any, related to uncertain income tax positions in income tax expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Stock-Based Compensation&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We recognize all share-based payments to employees&#13;and non-employee directors (as compensation for service) as noncash compensation expense in the condensed consolidated financial&#13;statements based on the fair values of such payments. Stock-based compensation expense recognized each period is based on the value&#13;of the portion of share-based payment awards that is ultimately expected to vest during the period. Forfeitures are estimated at&#13;the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;For share-based payments to consultants and other&#13;third-parties (including related parties), noncash compensation expense is determined at the &amp;#147;measurement date.&amp;#148; The&#13;expense is recognized over the vesting period of the award. Until the measurement date is reached, the total amount of compensation&#13;expense remains uncertain. We record compensation expense based on the fair value of the award at the reporting date. The awards&#13;to consultants and other third-parties (including related parties) are then revalued, or the total compensation is recalculated&#13;based on the then current fair value, at each subsequent reporting date.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In addition, because some of the options, restricted&#13;stock and warrants issued to employees, consultants and other third-parties vest upon achievement of certain milestones, the total&#13;expense is uncertain. Compensation expense for such awards that vest upon the achievement of milestones is recognized when the&#13;achievement of such milestones becomes probable.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Basic and Diluted Net Loss Per Common Share&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Basic net loss per share of our common stock&#13;is calculated by dividing net loss applicable to the common stock by the weighted-average number of our common stock outstanding&#13;for the period. Diluted net loss per share of common stock is the same as basic net loss per share of common stock since potentially&#13;dilutive securities from stock options, stock warrants and convertible preferred stock would have an antidilutive effect either&#13;because we incurred a net loss during the period presented or because such potentially dilutive securities were out of the money&#13;and the Company realized net income during the period presented. The amounts of potentially dilutive securities excluded from the&#13;calculation were 6,449,737 and 5,668,134 for the three and six months ended June 30, 2016 and 2015, respectively. The following&#13;outstanding shares of common stock equivalents were excluded from the computation of net loss per share attributable to common&#13;stockholders for the periods presented because including them would have been antidilutive:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Three and Six Months Ended June 30,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 65%"&gt;&lt;font style="font-size: 8pt"&gt;Unvested restricted stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 13%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,270,084&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;4,431,430&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Warrants&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,164,708&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,218,749&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Shares issuable upon note conversion&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;14,945&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;17,803&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Options&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;152&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;6,449,737&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,668,134&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Long-Lived Assets and Goodwill&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Long-lived assets are reviewed for potential&#13;impairment when circumstances indicate that the carrying value of long-lived tangible and intangible assets with finite lives may&#13;not be recoverable. Management&amp;#146;s policy in determining whether an impairment indicator exists, a triggering event, comprises&#13;measurable operating performance criteria as well as qualitative measures. If an analysis is necessitated by the occurrence of&#13;a triggering event, we make certain assumptions in determining the impairment amount. If the carrying amount of an asset exceeds&#13;its estimated future cash flows, an impairment charge is recognized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Goodwill is reviewed for impairment annually,&#13;or earlier when events arise that could indicate that an impairment exists. We test for goodwill impairment using a two-step process.&#13;The first step compares the fair value of the reporting unit with the unit's carrying value, including goodwill. When the carrying&#13;value of the reporting unit is greater than fair value, the unit&amp;#146;s goodwill may be impaired, and the second step must be&#13;completed to measure the amount of the goodwill impairment charge, if any. In the second step, the implied fair value of the reporting&#13;unit&amp;#146;s goodwill is compared with the carrying amount of the unit&amp;#146;s goodwill. If the carrying amount is greater than&#13;the implied fair value, the carrying value of the goodwill must be written down to its implied fair value. We will continue to&#13;perform impairment tests annually, at December 31, and whenever events or changes in circumstances suggest that the carrying value&#13;of an asset may not be recoverable.&lt;/p&gt;</us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock>
    <us-gaap:CashAndCashEquivalentsDisclosureTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following tables summarize our cash and cash&#13;equivalents at June 30, 2016 and December 31, 2015:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;December 31, 2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 64%"&gt;&lt;font style="font-size: 8pt"&gt;Money market funds&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;8,514,029&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;8,265,583&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Checking and bank deposits&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;20,063,803&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;46,795,746&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;28,577,832&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;55,061,329&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:CashAndCashEquivalentsDisclosureTextBlock>
    <us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our investments as of June 30, 2016 and December&#13;31, 2015 are classified as held-to-maturity. Held-to-maturity investments are recorded at amortized cost.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following tables summarize our investment&#13;securities at June 30, 2016 and December 31, 2015:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Amortized cost, as adjusted&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding gains&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding losses&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Estimated fair value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Short-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 44%"&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between July 2016 and June 2017) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,680,319&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,601&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,702,920&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;Long-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between July 2017 and January 2018) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;21,435,015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;80,328&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;21,515,343&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total short-term and long-term investment securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,115,334&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;102,929&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,218,263&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;December 31, 2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Amortized cost, as adjusted&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding gains&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding losses&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Estimated fair value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Short-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 44%"&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between January 2016 and December 2016) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,166,512&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,822&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,143,690&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;Long-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between January 2017 and December 2017) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,003,032&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;85,846&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;24,917,186&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total short-term and long-term investment securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,169,544&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;108,668&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,060,876&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock>
    <us-gaap:FairValueDisclosuresTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We measure certain financial assets and liabilities&#13;at fair value on a recurring basis in the condensed consolidated financial statements. The fair value hierarchy ranks the quality&#13;and reliability of inputs, or assumptions, used in the determination of fair value and requires financial assets and liabilities&#13;carried at fair value to be classified and disclosed in one of the following three categories:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" style="width: 100%"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72px; padding: 0.75pt; font: 12pt Times New Roman, Times, Serif"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding: 0.75pt; font: 12pt Times New Roman, Times, Serif; text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;Level 1 &amp;#150; quoted prices in active markets for identical assets and liabilities;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" style="width: 100%"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72px; padding: 0.75pt; font: 12pt Times New Roman, Times, Serif"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding: 0.75pt; font: 12pt Times New Roman, Times, Serif; text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;Level 2 &amp;#150; inputs other than Level 1 quoted prices that are directly or indirectly observable; and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" style="width: 100%"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="vertical-align: top; width: 72px; padding: 0.75pt; font: 12pt Times New Roman, Times, Serif"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding: 0.75pt; font: 12pt Times New Roman, Times, Serif; text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;Level 3 &amp;#150; unobservable inputs that are not corroborated by market data.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;As of June 30, 2016 and December 31, 2015, the&#13;fair values of cash and cash equivalents, restricted cash, and notes and interest payable, current portion approximate their carrying&#13;value.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="background-color: white"&gt;At the&#13;time of our merger (we were then known as Manhattan Pharmaceuticals, Inc. (&amp;#147;Manhattan&amp;#148;)) with Ariston Pharmaceuticals,&#13;Inc. (&amp;#147;Ariston&amp;#148;) in March 2010, Ariston issued $15.5 million of five-year 5% notes payable (the &amp;#147;5% Notes&amp;#148;)&#13;in satisfaction of several note payable issuances.&amp;#160;&amp;#160;The 5% Notes and accrued and unpaid interest thereon are convertible&#13;at the option of the holder into common stock at the conversion price of $1,125 per share.&amp;#160;&amp;#160;Ariston agreed to make quarterly&#13;payments on the 5% Notes&amp;#160;equal to 50% of the net product cash flow received from the exploitation or commercialization of&#13;Ariston&amp;#146;s product candidates, AST-726 and AST-915.&amp;#160;&amp;#160;We have no obligations under the 5% Notes aside from (a) 50%&#13;of the net product cash flows from Ariston&amp;#146;s product candidates, if any, payable to noteholders; and (b) the conversion feature,&#13;discussed above.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="background-color: white"&gt;The cumulative&#13;liability including accrued and unpaid interest of the 5% Notes was approximately $16.8 million at June 30, 2016 and $19.9 million&#13;at December 31, 2015. &lt;/font&gt;No payments have been made on the 5% Notes as of June 30, 2016.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In December 2011, we elected the fair value option&#13;for valuing the 5% Notes. The fair value option was elected in order to reflect in our financial statements the assumptions that&#13;market participants use in evaluating these financial instruments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;As of December 31, 2013, as a result of expiring&#13;intellectual property rights and other factors, it was determined that net product cash flows from AST-726 were unlikely. As we&#13;have no other obligations under the 5% Notes aside from the net product cash flows and the conversion feature, the conversion feature&#13;was used to estimate the 5% Notes&amp;#146; fair value as of June 30, 2016 and December 31, 2015. The assumptions, assessments and&#13;projections of future revenues are subject to uncertainties, difficult to predict, and require significant judgment. The use of&#13;different assumptions, applying different judgment to inherently subjective matters and changes in future market conditions could&#13;result in significantly different estimates of fair value and the differences could be material to our condensed consolidated financial&#13;statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following tables provide the fair value measurements&#13;of applicable financial liabilities as of June 30, 2016 and December 31, 2015:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Financial liabilities at fair value as of June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 1&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 2&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 3&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 52%"&gt;&lt;font style="font-size: 8pt"&gt;5% Notes&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Financial liabilities at fair value as of December 31, 2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 1&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 2&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 3&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 52%"&gt;&lt;font style="font-size: 8pt"&gt;5% Notes&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The Level 3 amounts above represent the fair&#13;value of the 5% Notes and related accrued interest.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following table summarizes the changes in&#13;Level 3 instruments during the six months ended June 30, 2016:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 88%"&gt;&lt;font style="font-size: 8pt"&gt;Fair value at December 31, 2015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Interest accrued on face value of 5% Notes&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;463,161&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Conversion of 5% notes&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(30,601&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Change in fair value of Level 3 liabilities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(553,545&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Fair value at June 30, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The change in the fair value of the Level 3 liabilities&#13;is reported in other (income) expense in the accompanying condensed consolidated statements of operations.&lt;/p&gt;</us-gaap:FairValueDisclosuresTextBlock>
    <us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Preferred Stock&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our amended and restated certificate of incorporation&#13;authorizes the issuance of up to 10,000,000 shares of preferred stock, $0.001 par value, with rights senior to those of our common&#13;stock, &lt;font style="background-color: white"&gt;issuable in one or more series. Upon issuance, we can determine the rights, preferences,&#13;privileges and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights,&#13;voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series&#13;or the designation of such series, any or all of which may be greater than the rights of common stock.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Common Stock&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our amended and restated certificate of incorporation&#13;authorizes the issuance of up to 150,000,000 shares of $0.001 par value common stock.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="background-color: white"&gt;In December&#13;2014, we filed a shelf registration statement on Form S-3 (the &amp;#147;2015 S-3&amp;#148;), which was declared effective in January&#13;2015. Under the 2015 S-3, the Company may sell up to a total of $250 million of its securities. In connection with the 2015 S-3,&#13;we amended our 2013 At-the-Market Issuance Sales Agreement with MLV &amp;#38; Co. LLC (the &amp;#147;2015 ATM&amp;#148;) such that we may&#13;issue and sell additional shares of our common stock, having an aggregate offering price of up to $175.0 million, from time to&#13;time through MLV &amp;#38; Co. LLC (&amp;#147;MLV&amp;#148;) and FBR Capital Markets &amp;#38; Co. (&amp;#147;FBR&amp;#148;, each of MLV and FBR individually&#13;an &amp;#147;Agent&amp;#148; and collectively the &amp;#147;Agents&amp;#148;), acting as the sales agents. Under the 2015 ATM we pay the Agents&#13;a commission rate of up to 3.0% of the gross proceeds from the sale of any shares of common stock sold through the Agents.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="background-color: white"&gt;During&#13;the six months ended June 30, 2016, we sold a total of 396,811 shares of common stock under the 2015 ATM for aggregate total gross&#13;proceeds of approximately $3.6 million at an average selling price of $9.00 per share, resulting in net proceeds of approximately&#13;$3.5 million after deducting commissions and other transaction costs.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; letter-spacing: normal; word-spacing: 0px; background-color: rgb(255, 255, 255)"&gt;The&#13;2015 S-3 is currently our only active shelf registration statement. After deducting shares already sold, including under the 2015&#13;ATM, there are approximately $178 million of common stock that remain available for sale under the 2015 S-3. We may offer the&#13;securities under the 2015 S-3 from time to time in response to market conditions or other circumstances if we believe such a plan&#13;of financing is in the best interests of our stockholders. We believe that the 2015 S-3 provides us with the flexibility to raise&#13;additional capital to finance our operations as needed.&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Equity Incentive Plans&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The TG Therapeutics, Inc. Amended and Restated&#13;2012 Incentive Plan (&amp;#147;2012 Incentive Plan&amp;#148;) was approved by stockholders in June 2015. As of June 30, 2016, no options&#13;were outstanding and up to an additional 4,183,861 shares may be issued under the 2012 Incentive Plan.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;u&gt;Restricted Stock&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Certain employees, directors and consultants&#13;have been awarded restricted stock. The restricted stock vesting consists of milestone and time-based vesting. The following table&#13;summarizes restricted share activity for the six months ended June 30, 2016:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid"&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Number of Shares&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Weighted Average Grant Date Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 76%; background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at December 31, 2015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;7,359,915&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;7.83&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Granted&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;14,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;9.43&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Vested&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(570,600&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;7.07&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Forfeited&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(33,231&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;11.79&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at June 30, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;6,770,084&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;7.85&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Total expense associated with restricted stock&#13;grants was approximately $1.6 million and $6.2 million during the three months ended June 30, 2016 and 2015, respectively, and&#13;$3.3 million,  and $11.6 million during the six months ended June 30, 2016 and 2015, respectively. As of June 30, 2016, there&#13;was approximately $17.3 million of total unrecognized compensation cost related to unvested time-based restricted stock, which&#13;is expected to be recognized over a weighted-average period of 1.9 years. This amount does not include, as of June 30, 2016, 411,172&#13;shares of restricted stock outstanding which are milestone-based and vest upon certain corporate milestones; and 2,234,958 shares&#13;of restricted stock outstanding issued to non-employees, the expense for which is determined each reporting period at the measurement&#13;date. The expense is recognized over the vesting period of the award. Until the measurement date is reached, the total amount&#13;of compensation expense remains uncertain. We record compensation expense based on the fair value of the award at the reporting&#13;date.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;u&gt;Warrants&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following table summarizes warrant activity&#13;for the six months ended June 30, 2016:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid"&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Warrants&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid"&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted-average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;exercise price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Aggregate Intrinsic Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 55%; background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at December 31, 2015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,186,749&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.37&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;11,341,452&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Issued&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Exercised&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(22,041&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.28&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Expired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at June 30, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,164,708&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.37&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;4,291,924&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&lt;i&gt;Stock-Based&#13;Compensation&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;We&#13;did not grant any stock options during the six months ended June 30, 2016 and 2015.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: normal 8pt Times New Roman, Times, Serif; text-transform: none; letter-spacing: normal; word-spacing: 0px; background-color: rgb(255, 255, 255)"&gt;The&#13;following table summarizes stock-based compensation expense information about restricted stock and stock options for the three&#13;and six months ended June 30, 2016 and 2015:&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; width: 100%; font: 12pt Times New Roman, Times, Serif"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="font-size: 8pt; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&lt;b&gt;Three months ended June 30,&lt;/b&gt; &lt;/font&gt;&lt;/td&gt;&lt;td style="font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="font-size: 8pt; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&lt;b&gt;Six months ended June 30,&lt;/b&gt; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="font-size: 8pt; font-weight: bold; text-align: center; border-bottom: Black 1pt solid"&gt;2016&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="font-size: 8pt; font-weight: bold; text-align: center; border-bottom: Black 1pt solid"&gt;2015&lt;/td&gt;&lt;td style="padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; vertical-align: bottom; border-bottom: Black 1pt solid"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; vertical-align: bottom; border-bottom: Black 1pt solid"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: rgb(204,238,255)"&gt;&#13;    &lt;td style="width: 40%; font-size: 8pt; text-align: left"&gt;Stock-based compensation expense associated with restricted stock&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;1,648,397&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;6,242,986&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;3,347,362&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; text-align: left"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;11,600,014&lt;/font&gt;&lt;/td&gt;&lt;td style="width: 1%; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: White"&gt;&#13;    &lt;td style="font-size: 8pt; text-align: left; padding-bottom: 1pt"&gt;Stock-based compensation expense associated with option grants&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: rgb(204,238,255)"&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;1,648,397&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;6,242,986&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;3,347,362&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; text-align: left"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; text-align: right"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;11,600,014&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;</us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock>
    <us-gaap:DebtDisclosureTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0"&gt;The following is a summary of notes payable:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="11" style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&amp;#160;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="11" style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;b&gt;December&lt;/b&gt; &lt;b&gt;31&lt;/b&gt;, &lt;b&gt;201&lt;/b&gt;5&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Current portion,&amp;#160;net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Non-current portion, net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Current portion,&amp;#160;net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Non-current portion, net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 34%; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;Convertible 5% Notes Payable&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 1pt solid; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 8%; border-bottom: black 1pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 1pt solid; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 8%; border-bottom: black 1pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 1pt solid; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 8%; border-bottom: black 1pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 1pt solid; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13; 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   &lt;td style="width: 8%; border-bottom: black 1pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;211,549&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;Convertible 5% Notes Payable&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;On March 8, 2010, Manhattan entered into&#13;an Agreement and Plan of Merger (the &amp;#34;Merger Agreement&amp;#34;) by and among Manhattan, Ariston and Ariston Merger Corp., a&#13;Delaware corporation and wholly-owned subsidiary of Manhattan (the &amp;#34;Merger Sub&amp;#34;).&amp;#160; Pursuant to the terms and conditions&#13;of the Merger Agreement, on March 8, 2010, the Merger Sub merged with and into Ariston (the &amp;#34;Merger&amp;#34;), with Ariston being&#13;the surviving corporation of the Merger.&amp;#160; As a result of the Merger, Ariston became a wholly-owned subsidiary of Manhattan.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The 5% Notes and accrued and unpaid interest&#13;thereon are convertible at the option of the holder into common stock at the conversion price of $1,125 per share.&amp;#160;&amp;#160;Ariston&#13;agreed to make quarterly payments on the 5% Notes equal to 50% of the net product cash flow received from the exploitation or commercialization&#13;of Ariston&amp;#146;s product candidates, AST-726 and AST-915.&amp;#160;&amp;#160;&lt;font style="background-color: white"&gt;We have no obligation&#13;under the 5% Notes aside from a) 50% of the net product cash flows from Ariston&amp;#146;s product candidates, if any, payable to&#13;noteholders; and b) the conversion feature, discussed above.&lt;/font&gt; Interest accrues monthly, is added to principal on an annual&#13;basis, every March 8, and is payable at maturity, which was March 8, 2015.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="background-color: white"&gt;The&#13;cumulative liability including accrued and unpaid interest of these notes was approximately $16.8 million at June 30, 2016 and&#13;$19.9 million at December 31, 2015. &lt;/font&gt;No payments have been made on the 5% Notes as of June 30, 2016.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In December 2011, we elected the fair&#13;value option for valuing the 5% Notes. The fair value option was elected in order to reflect in our financial statements the assumptions&#13;that market participants use in evaluating these financial instruments (See Note 4 for further details).&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 11pt/107% Calibri, Helvetica, Sans-Serif; margin: 0 0 8pt"&gt;&amp;#160;&lt;/p&gt;</us-gaap:DebtDisclosureTextBlock>
    <tgtx:LicenseAgreementDisclosureTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;BET&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In May 2016, as part of a broader agreement with&#13;Jubilant Biosys (&amp;#147;Jubilant&amp;#148;), an India-based biotechnology company, we entered into a sub-license agreement (&amp;#147;JBET&#13;Agreement&amp;#148;) with Checkpoint Therapeutics, Inc. (&amp;#147;Checkpoint&amp;#148;), (see Note 8), for the&#13;development and commercialization of Jubilant&amp;#146;s novel BET inhibitor program in the field of hematological malignancies.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Under the terms of the agreement,&amp;#160;we&#13;paid Checkpoint an up-front licensing fee of&amp;#160;$1.0 million&amp;#160;and will make additional payments contingent on certain&#13;preclinical, clinical, and regulatory milestones, including commercial milestones totaling up to approximately&amp;#160;$177&#13;million&amp;#160;and a single-digit royalty on net sales.&amp;#160;TG will also provide funding to support certain targeted&#13;research efforts at Jubilant.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;&lt;i&gt;TG-1101&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In November 2012, we entered into an exclusive&#13;(within the territory) sublicense agreement with Ildong relating to the development and commercialization of TG-1101 in South Korea&#13;and Southeast Asia. Under the terms of the sublicense agreement, Ildong has been granted a royalty bearing, exclusive right, including&#13;the right to grant sublicenses, to develop and commercialize TG-1101 in South Korea, Taiwan, Singapore, Indonesia, Malaysia, Thailand,&#13;Philippines, Vietnam, and Myanmar.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;An upfront payment of $2.0 million, which was&#13;received in December 2012,&lt;font style="background-color: white"&gt; net of $0.3 million of&amp;#160;income tax withholdings&lt;/font&gt;, is&#13;being recognized as license revenue on a straight-line basis over the life of the agreement, which is through the expiration of&#13;the last licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is&#13;earlier terminated, and represents the estimated period over which we will have certain ongoing responsibilities under the sublicense&#13;agreement. We recorded license revenue of approximately $38,000 for each of the three months ended June 30, 2016 and 2015, and&#13;$76,000 for each of the six months ended June 30, 2016 and 2015 and, at June 30, 2016 and December 31, 2015, have deferred revenue&#13;of approximately $1.4 million and $1.5 million, respectively, associated with this $2.0 million payment (approximately $0.2 million&#13;of which has been classified in current liabilities at June 30, 2016 and December 31, 2015).&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;We may receive up to an&#13;additional $5.0 million in payments upon the achievement of pre-specified milestones. In addition, upon commercialization, Ildong&#13;will make royalty payments to us on net sales of TG-1101 in the sublicense territory.&lt;/p&gt;</tgtx:LicenseAgreementDisclosureTextBlock>
    <tgtx:LiquidityDisclosure1PolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We have incurred operating losses since our inception&#13;and expect to continue to incur operating losses for the foreseeable future and, may never become profitable. As of June 30, 2016,&#13;we have an accumulated deficit of approximately $187.9 million.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our major sources of cash have been proceeds&#13;from the private placement and public offering of equity securities. We have not yet commercialized any of our drug candidates&#13;and cannot be sure if we will ever be able to do so. Even if we commercialize one or more of our drug candidates, we may not become&#13;profitable. Our ability to achieve profitability depends on many factors, including our ability to obtain regulatory approval for&#13;our drug candidates; successfully completing any post-approval regulatory obligations; and successfully commercializing our drug&#13;candidates alone or in partnership. We may continue to incur substantial operating losses even if we begin to generate revenues&#13;from our drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;As of June 30, 2016, we had approximately&#13;$75.8 million in cash, cash equivalents, investment securities, and interest receivable. We anticipate that our cash and cash&#13;equivalents and investments will be sufficient to fund our anticipated operating cash requirements for approximately 18 to&#13;24 months from June 30, 2016. The actual amount of cash that we will need to operate is subject to many factors, including,&#13;but not limited to, the timing, design and conduct of clinical trials for our drug candidates. We are dependent upon&#13;significant future financing to provide the cash necessary to execute our current strategic plan, including the&#13;commercialization of any of our drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Our common stock is listed on the Nasdaq Capital&#13;Market and trades under the symbol &amp;#147;TGTX.&amp;#148;&lt;/p&gt;</tgtx:LiquidityDisclosure1PolicyTextBlock>
    <us-gaap:UseOfEstimates contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The preparation of financial statements in conformity&#13;with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the&#13;disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and&#13;expenses during the applicable reporting period. Actual results could differ from those estimates. Such differences could be material&#13;to the consolidated financial statements.&lt;/p&gt;</us-gaap:UseOfEstimates>
    <us-gaap:CashAndCashEquivalentsPolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We treat liquid investments with original maturities&#13;of three months or less when purchased as cash and cash equivalents.&lt;/p&gt;</us-gaap:CashAndCashEquivalentsPolicyTextBlock>
    <us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We record cash pledged or held in trust as restricted&#13;cash. As of June 30, 2016 and December 31, 2015, we have approximately $0.6 million of restricted cash pledged to secure a line&#13;of credit as a security deposit for an &lt;font style="background-color: white"&gt;Office Agreement &lt;/font&gt;(see Note 8).&lt;/p&gt;</us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy>
    <us-gaap:MarketableSecuritiesPolicy contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Investment securities at June 30, 2016 and December&#13;31, 2015 consist of short-term and long-term government securities. We classify these securities as held-to-maturity. Held-to-maturity&#13;securities are those securities in which we have the ability and intent to hold the security until maturity. Held-to-maturity securities&#13;are recorded at amortized cost, adjusted for the amortization or accretion of premiums or discounts. Premiums and discounts are&#13;amortized or accreted over the life of the related held-to-maturity security as an adjustment to yield using the effective interest&#13;method.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;A decline in the market value of any investment&#13;security below cost, that is deemed to be other than temporary, results in a reduction in the carrying amount to fair value. The&#13;impairment is charged to operations and a new cost basis for the security is established. Other-than-temporary impairment charges&#13;would be included in interest and other (income) expense, net. Dividend and interest income are recognized when earned.&lt;/p&gt;</us-gaap:MarketableSecuritiesPolicy>
    <us-gaap:ConcentrationRiskCreditRisk contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Financial instruments that potentially subject&#13;the Company to concentrations of credit risk consist primarily of cash and cash equivalents, short-term investments and long-term&#13;investments. The Company maintains its cash and cash equivalents, short-term investments and long-term investments with high-credit&#13;quality financial institutions. At times, such amounts may exceed federally-insured limits.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;</us-gaap:ConcentrationRiskCreditRisk>
    <us-gaap:RevenueRecognitionPolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We recognize license revenue in accordance with&#13;the revenue recognition guidance of the FASB Accounting Standards Codification (or &amp;#147;Codification&amp;#148;). We analyze each&#13;element of our licensing agreement to determine the appropriate revenue recognition. The terms of the license agreement may include&#13;payments to us of non-refundable up-front license fees, milestone payments if specified objectives are achieved, and/or royalties&#13;on product sales. We recognize revenue from upfront payments over the period of significant involvement under the related agreements&#13;unless the fee is in exchange for products delivered or services rendered that represent the culmination of a separate earnings&#13;process and no further performance obligation exists under the contract. We recognize milestone payments as revenue upon the achievement&#13;of specified milestones only if (1) the milestone payment is non-refundable, (2) substantive effort is involved in achieving the&#13;milestone, (3) the amount of the milestone is reasonable in relation to the effort expended or the risk associated with achievement&#13;of the milestone, and (4) the milestone is at risk for both parties. If any of these conditions are not met, we defer the milestone&#13;payment and recognize it as revenue over the estimated period of performance under the contract.&lt;/p&gt;</us-gaap:RevenueRecognitionPolicyTextBlock>
    <us-gaap:ResearchAndDevelopmentExpensePolicy contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Generally, research and development costs are&#13;expensed as incurred. Non-refundable advance payments for goods or services that will be used or rendered for future research and&#13;development activities are deferred and amortized over the period that the goods are delivered or the related services are performed,&#13;subject to an assessment of recoverability. We make estimates of costs incurred in relation to external clinical research organizations,&#13;or CROs, and clinical site costs. We analyze the progress of clinical trials, including levels of patient enrollment, invoices&#13;received and contracted costs when evaluating the adequacy of the amount expensed and the related prepaid asset and accrued liability.&#13;Significant judgments and estimates must be made and used in determining the accrued liability balance and expense in any accounting&#13;period. We review and accrue CRO expenses and clinical trial study expenses based on work performed and rely upon estimates of&#13;those costs applicable to the stage of completion of a study. Accrued CRO costs are subject to revisions as such trials progress&#13;to completion. Revisions are charged to expense in the period in which the facts that give rise to the revision become known. With&#13;respect to clinical site costs, the financial terms of these agreements are subject to negotiation and vary from contract to contract.&#13;Payments under these contracts may be uneven, and depend on factors such as the achievement of certain events, the successful recruitment&#13;of patients, the completion of portions of the clinical trial or similar conditions. The objective of our policy is to match the&#13;recording of expenses in our financial statements to the actual services received and efforts expended. As such, expense accruals&#13;related to clinical site costs are recognized based on our estimate of the degree of completion of the event or events specified&#13;in the specific clinical study or trial contract.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Prepaid research and development in our consolidated&#13;balance sheets includes, among other things, certain costs related to development and manufacturing services. These development&#13;and manufacturing agreements often require payments in advance of services performed or goods received. Accordingly, as of June&#13;30, 2016 and December 31, 2015, we recorded approximately $14.5 million and $9.2 million of prepaid development and manufacturing&#13;services, respectively, in prepaid research and development related to such advance agreements.&lt;/p&gt;</us-gaap:ResearchAndDevelopmentExpensePolicy>
    <us-gaap:IncomeTaxPolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Income taxes are accounted for under the asset&#13;and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary&#13;differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases,&#13;operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected&#13;to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect&#13;on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment&#13;date. If the likelihood of realizing the deferred tax assets or liability is less than &amp;#147;more likely than not,&amp;#148; a valuation&#13;allowance is then created.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We, and our subsidiaries, file income tax returns&#13;in the U.S. Federal jurisdiction and in various states. We have tax net operating loss carryforwards that are subject to examination&#13;for a number of years beyond the year in which they were generated for tax purposes. Since a portion of these net operating loss&#13;carryforwards may be utilized in the future, many of these net operating loss carryforwards will remain subject to examination.&#13;We recognize interest and penalties, if any, related to uncertain income tax positions in income tax expense.&lt;/p&gt;</us-gaap:IncomeTaxPolicyTextBlock>
    <us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We recognize all share-based payments to employees&#13;and non-employee directors (as compensation for service) as noncash compensation expense in the condensed consolidated financial&#13;statements based on the fair values of such payments. Stock-based compensation expense recognized each period is based on the value&#13;of the portion of share-based payment awards that is ultimately expected to vest during the period. Forfeitures are estimated at&#13;the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;For share-based payments to consultants and other&#13;third-parties (including related parties), noncash compensation expense is determined at the &amp;#147;measurement date.&amp;#148; The&#13;expense is recognized over the vesting period of the award. Until the measurement date is reached, the total amount of compensation&#13;expense remains uncertain. We record compensation expense based on the fair value of the award at the reporting date. The awards&#13;to consultants and other third-parties (including related parties) are then revalued, or the total compensation is recalculated&#13;based on the then current fair value, at each subsequent reporting date.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In addition, because some of the options, restricted&#13;stock and warrants issued to employees, consultants and other third-parties vest upon achievement of certain milestones, the total&#13;expense is uncertain. Compensation expense for such awards that vest upon the achievement of milestones is recognized when the&#13;achievement of such milestones becomes probable.&lt;/p&gt;</us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy>
    <us-gaap:EarningsPerSharePolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Basic net loss per share of our common stock&#13;is calculated by dividing net loss applicable to the common stock by the weighted-average number of our common stock outstanding&#13;for the period. Diluted net loss per share of common stock is the same as basic net loss per share of common stock since potentially&#13;dilutive securities from stock options, stock warrants and convertible preferred stock would have an antidilutive effect either&#13;because we incurred a net loss during the period presented or because such potentially dilutive securities were out of the money&#13;and the Company realized net income during the period presented. The amounts of potentially dilutive securities excluded from the&#13;calculation were 6,449,737 and 5,668,134 for the three and six months ended June 30, 2016 and 2015, respectively. The following&#13;outstanding shares of common stock equivalents were excluded from the computation of net loss per share attributable to common&#13;stockholders for the periods presented because including them would have been antidilutive:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Three and Six Months Ended June 30,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 65%"&gt;&lt;font style="font-size: 8pt"&gt;Unvested restricted stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 13%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,270,084&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;4,431,430&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Warrants&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,164,708&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,218,749&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Shares issuable upon note conversion&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;14,945&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;17,803&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Options&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;152&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;6,449,737&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,668,134&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;</us-gaap:EarningsPerSharePolicyTextBlock>
    <tgtx:ImpairmentOfTangibleAndIntangibleAssetIncludingGoodwillPolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Long-lived assets are reviewed for potential&#13;impairment when circumstances indicate that the carrying value of long-lived tangible and intangible assets with finite lives may&#13;not be recoverable. Management&amp;#146;s policy in determining whether an impairment indicator exists, a triggering event, comprises&#13;measurable operating performance criteria as well as qualitative measures. If an analysis is necessitated by the occurrence of&#13;a triggering event, we make certain assumptions in determining the impairment amount. If the carrying amount of an asset exceeds&#13;its estimated future cash flows, an impairment charge is recognized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Goodwill is reviewed for impairment annually,&#13;or earlier when events arise that could indicate that an impairment exists. We test for goodwill impairment using a two-step process.&#13;The first step compares the fair value of the reporting unit with the unit's carrying value, including goodwill. When the carrying&#13;value of the reporting unit is greater than fair value, the unit&amp;#146;s goodwill may be impaired, and the second step must be&#13;completed to measure the amount of the goodwill impairment charge, if any. In the second step, the implied fair value of the reporting&#13;unit&amp;#146;s goodwill is compared with the carrying amount of the unit&amp;#146;s goodwill. If the carrying amount is greater than&#13;the implied fair value, the carrying value of the goodwill must be written down to its implied fair value. We will continue to&#13;perform impairment tests annually, at December 31, and whenever events or changes in circumstances suggest that the carrying value&#13;of an asset may not be recoverable.&lt;/p&gt;</tgtx:ImpairmentOfTangibleAndIntangibleAssetIncludingGoodwillPolicyTextBlock>
    <us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock contextRef="P01_01_2016To03_31_2016">&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Three and Six Months Ended June 30,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 65%"&gt;&lt;font style="font-size: 8pt"&gt;Unvested restricted stock&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 13%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,270,084&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;4,431,430&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Warrants&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,164,708&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,218,749&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Shares issuable upon note conversion&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;14,945&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;17,803&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Options&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;152&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;6,449,737&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;5,668,134&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock>
    <us-gaap:ScheduleOfCashAndCashEquivalentsTableTextBlock contextRef="P01_01_2016To03_31_2016">&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;December 31, 2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 64%"&gt;&lt;font style="font-size: 8pt"&gt;Money market funds&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;8,514,029&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;8,265,583&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Checking and bank deposits&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;20,063,803&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;46,795,746&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;28,577,832&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;55,061,329&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:ScheduleOfCashAndCashEquivalentsTableTextBlock>
    <us-gaap:HeldToMaturitySecuritiesTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following tables summarize our investment&#13;securities at June 30, 2016 and December 31, 2015:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Amortized cost, as adjusted&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding gains&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding losses&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Estimated fair value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Short-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 44%"&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between July 2016 and June 2017) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,680,319&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,601&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,702,920&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;Long-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between July 2017 and January 2018) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;21,435,015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;80,328&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;21,515,343&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total short-term and long-term investment securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,115,334&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;102,929&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,218,263&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;December 31, 2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Amortized cost, as adjusted&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding gains&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Gross unrealized holding losses&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Estimated fair value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Short-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 44%"&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between January 2016 and December 2016) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,166,512&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,822&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;22,143,690&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;Long-term investments:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Obligations of domestic governmental agencies (maturing between January 2017 and December 2017) (held-to-maturity)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;25,003,032&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;85,846&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;24,917,186&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total short-term and long-term investment securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,169,544&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;108,668&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;47,060,876&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</us-gaap:HeldToMaturitySecuritiesTextBlock>
    <us-gaap:FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The following tables provide the fair value measurements&#13;of applicable financial liabilities as of June 30, 2016 and December 31, 2015:&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="14" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Financial liabilities at fair value as of June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 1&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 2&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Level 3&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 52%"&gt;&lt;font style="font-size: 8pt"&gt;5% Notes&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 0%; border-bottom: black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;90,564&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13; 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    <tgtx:ScheduleOfWarrantsActivityTableTextBlock contextRef="P01_01_2016To03_31_2016">&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid"&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Warrants&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid"&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted-average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;exercise price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1pt solid; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Aggregate Intrinsic Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="width: 55%; background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at December 31, 2015&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,186,749&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.37&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 12%; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;11,341,452&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Issued&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Exercised&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;(22,041&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.28&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 8pt"&gt;Expired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1pt solid; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;--&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="background-color: #CCEEFF"&gt;&lt;font style="font-size: 8pt"&gt;Outstanding at June 30, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;1,164,708&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;2.37&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double"&gt;&lt;font style="font-size: 8pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt double; text-align: right"&gt;&lt;font style="font-size: 8pt"&gt;4,291,924&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 3pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;</tgtx:ScheduleOfWarrantsActivityTableTextBlock>
    <tgtx:ScheduleOfShareBasedCompensationExpenseTableTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; width: 100%; font: 12pt Times New Roman, Times, Serif"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="font-size: 8pt; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&lt;b&gt;Three months ended June 30,&lt;/b&gt; &lt;/font&gt;&lt;/td&gt;&lt;td style="font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="font-size: 8pt; text-align: center"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&lt;b&gt;Six months ended June 30,&lt;/b&gt; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="font-size: 8pt; font-weight: bold; text-align: center; border-bottom: Black 1pt solid"&gt;2016&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="font-size: 8pt; font-weight: bold; text-align: center; border-bottom: Black 1pt solid"&gt;2015&lt;/td&gt;&lt;td style="padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; vertical-align: bottom; border-bottom: Black 1pt solid"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; vertical-align: bottom; border-bottom: Black 1pt solid"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2015&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: rgb(204,238,255)"&gt;&#13;    &lt;td style="width: 40%; font-size: 8pt; text-align: left"&gt;Stock-based compensation expense associated with restricted stock&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;1,648,397&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;6,242,986&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%; font-size: 8pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="width: 10%; font-size: 8pt; text-align: right"&gt;3,347,362&lt;/td&gt;&lt;td style="width: 1%; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="width: 3%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; text-align: left"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="width: 10%; text-align: right"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;11,600,014&lt;/font&gt;&lt;/td&gt;&lt;td style="width: 1%; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: White"&gt;&#13;    &lt;td style="font-size: 8pt; text-align: left; padding-bottom: 1pt"&gt;Stock-based compensation expense associated with option grants&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; text-align: right"&gt;&amp;#151;&amp;#160;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: rgb(204,238,255)"&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;1,648,397&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;6,242,986&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: left"&gt;$&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; font-size: 8pt; text-align: right"&gt;3,347,362&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; font-size: 8pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 2.5pt double; text-align: left"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="border-bottom: Black 2.5pt double; text-align: right"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;11,600,014&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 2.5pt; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</tgtx:ScheduleOfShareBasedCompensationExpenseTableTextBlock>
    <us-gaap:ScheduleOfDebtTableTextBlock contextRef="P01_01_2016To03_31_2016">&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; width: 100%; font: 12pt Times New Roman, Times, Serif"&gt;&lt;tr style="vertical-align: bottom"&gt;&lt;td&gt;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="11" style="font-size: 8pt; text-align: center; border-bottom: Black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&amp;#160;&lt;b&gt;June 30, 2016&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="font-size: 8pt; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="11" style="font-size: 8pt; text-align: center; border-bottom: Black 1pt solid"&gt;&lt;font style="font-size: 8pt"&gt;&amp;#160;&lt;b&gt;December&lt;/b&gt; &lt;b&gt;31&lt;/b&gt;, &lt;b&gt;201&lt;/b&gt;5&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: rgb(204,238,255)"&gt;&#13;    &lt;td style="padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: center; vertical-align: bottom"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Current portion,&amp;#160;net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: center; vertical-align: bottom"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Non-current portion, net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: center; vertical-align: bottom"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="font-size: 8pt; font-weight: bold; padding-bottom: 1pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: left"&gt;&amp;#160;&lt;/td&gt;&lt;td style="border-bottom: Black 1pt solid; font-size: 8pt; font-weight: bold; text-align: center; vertical-align: bottom"&gt;&lt;font style="font-size: 8pt"&gt;&lt;b&gt;Current portion,&amp;#160;net&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;td style="padding-bottom: 1pt; 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margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Upon the adoption of ASU 2014-09:&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Revenue and expense recognition for freight services in process (ASC 605-20-S99-2)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Accounting for shipping and handling fees and costs (ASC 605-45-S99-1)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Accounting for consideration given by a vendor to a customer (ASC 605-50-S99-1)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; 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font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;&#13;&lt;td style="width: 1in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;font style="font: 8pt Symbol"&gt;&amp;#183;&lt;/font&gt;&lt;/td&gt;&lt;td&gt;&lt;font style="font-size: 8pt"&gt;Determining the nature of a host contract related to a hybrid financial instrument issued in the&#13;form of a share under ASC 815 (ASC 815-10-S99-3).&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;ASU 2016-11 is effective upon the adoption of&#13;ASU 2014-09 and ASU 2014-16.&amp;#160; The adoption of ASU 2016-11 is not expected to have a material impact on the Company&amp;#146;s&#13;condensed consolidated financial statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;In March 2016, the FASB issued ASU No. 2016-09, &amp;#147;Simplifying the Accounting for Share-Based Payments&amp;#148; (&amp;#147;ASU&#13;2016-09&amp;#148;). ASU 2016-09 simplifies several aspects of the accounting for employee share-based payment transactions for both&#13;public and nonpublic entities, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements,&#13;as well as classification in the statement of cash flows. ASU 2016-09 is effective for annual reporting periods beginning after&#13;December 15, 2016, including interim periods within those annual reporting periods. The provisions of this standard are not expected&#13;to significantly impact the Company.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;Other pronouncements issued by the FASB or other&#13;authoritative accounting standards group with future effective dates are either not applicable or not significant to our consolidated&#13;financial statements.&lt;/p&gt;</us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock>
    <us-gaap:RelatedPartyTransactionsDisclosureTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&lt;i&gt;LFB&#13;Biotechnologies&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;On&#13;January 30, 2012, we entered into an exclusive license agreement with LFB Biotechnologies, GTC Biotherapeutics and LFB/GTC LLC,&#13;all wholly-owned subsidiaries of LFB Group, relating to the development of ublituximab (the &amp;#147;LFB License Agreement&amp;#148;).&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;Under&#13;the terms of the LFB License Agreement, we utilize LFB Group for certain development and manufacturing services. We incurred expenses&#13;of $2.3 million and $2.2 million during the three months ended June 30, 2016 and 2015, respectively, and $2.3 million and $2.4&#13;million during the six months ended June 30, 2016 and 2015, respectively, which have been included in other research and development&#13;expenses in the accompanying condensed consolidated statements of operations. As of June 30, 2016 and December 31, 2015, we had&#13;approximately $1.7 million and $2.1 million, respectively, recorded in accounts payable related to the LFB License Agreement.&#13;In conjunction with the development and manufacturing services discussed above, certain agreements between us and LFB Group require&#13;payments in advance of services performed or goods delivered. Accordingly, as of June 30, 2016 and December 31, 2015, we recorded&#13;approximately $4.7 million and $3.0 million, respectively, in prepaid research and development for such advance payments.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&lt;i&gt;Other&#13;Parties&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;In&#13;March 2014, we entered into a shared services agreement (the &amp;#147;Opus Shared Services Agreement&amp;#148;) with Opus Point Partners&#13;Management, LLC (&amp;#147;Opus&amp;#148;) in which the parties agreed to share the costs of a rented facility and certain other services.&amp;#160;&#13;Our Executive Chairman and Interim Chief Executive Officer is a Managing Member of Opus. During the three and six months ended&#13;June 30, 2016, we incurred expenses of approximately $0.02 million and $0.1 million, respectively, principally for rent, related&#13;to this agreement. The Opus Shared Services Agreement is no longer in effect as we began occupying new space in April 2016. As&#13;of June 30, 2016, we had approximately $0.1 million recorded in accounts payable related to this Opus Shared Services Agreement.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;In&#13;October 2014, we entered into an agreement (the &amp;#147;Office Agreement&amp;#148;) with Fortress Biotech, Inc. (&amp;#147;Fortress&amp;#148;),&#13;to occupy approximately 45% of the 24,000 square feet of New York City office space leased by Fortress, which is now our corporate&#13;headquarters. The Office Agreement requires us to pay our respective share of the average annual rent and other costs of the 15-year&#13;lease. We approximate an average annual rental obligation of $1.1 million under the Office Agreement. We began to occupy this&#13;new space in April 2016, with rental payments beginning in the third quarter of 2016. Mr. Weiss, our Executive Chairman and Interim&#13;CEO, is also Executive Vice Chairman of Fortress.&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;In&#13;connection with the Office Agreement, we paid approximately $0.1 million in advance rent, which is recorded in other&#13;current assets in the accompanying condensed consolidated balance sheets as of June 30, 2016 and December 31, 2015. &lt;/font&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;During&#13;the six months ended June 30, 2016, &lt;font style="background-color: white"&gt;we agreed to pay Fortress $2.0 for our portion&#13;of the build out costs&lt;/font&gt;, which have been allocated to us at the 45% rate mentioned above. The allocated build-out costs have&#13;been recorded in Leasehold Interest and will be amortized over the 15-year term of the Office Agreement. After an&#13;initial commitment period of three (3) years, Fortress will assess actual office space utilization annually and if our&#13;utilization differs from the amount we have been billed, we will either receive credits or be assessed incremental&#13;utilization charges.&amp;#160; &lt;font style="background-color: white"&gt;As of June 30, 2016, we had approximately $1.1 &lt;/font&gt;million&#13;recorded in accounts payable related mostly to the upfront leasehold interest. &lt;font style="background-color: white"&gt;Also&#13;in connection with this lease, in October 2014 we pledged $0.6 million to secure a line of credit as a security deposit for&#13;the Office Agreement, which has been recorded as restricted cash in the accompanying condensed consolidated&#13;balance sheets.&lt;/font&gt;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;In&#13;July 2015, we entered into a Shared Services Agreement (the &amp;#147;Shared Services Agreement&amp;#148;) with Fortress to share the&#13;cost of certain services such as facilities use, personnel costs and other overhead and administrative costs. This Shared Services&#13;Agreement requires us to pay our respective share of services utilized. In connection with the Shared Services Agreement, we &lt;/font&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif"&gt;incurred&#13;expenses of &lt;font style="background-color: white"&gt;approximately $0.4 million for shared services for the six months ended June&#13;30, 2016, primarily related to shared personnel.&lt;/font&gt;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;&amp;#160;&lt;/font&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;font style="font: 8pt Times New Roman, Times, Serif; background-color: white"&gt;&lt;/font&gt;In&#13;May 2016, as part of a broader agreement with Jubilant, an India-based biotechnology company, we entered into the JBET Agreement&#13;with Checkpoint, a subsidiary of Fortress, for the development and commercialization of Jubilant&amp;#146;s novel BET inhibitor program&#13;in the field of hematological malignancies. We paid Checkpoint an up-front licensing fee of $1.0 million as part of the JBET Agreement.&#13;As of June 30, 2016, we had approximately $1.2 million recorded in accounts payable of which $1.0 million related to the licensing&#13;fee. Mr. Weiss is also the Executive Chairman of Checkpoint.&lt;/p&gt;</us-gaap:RelatedPartyTransactionsDisclosureTextBlock>
    <tgtx:LeaseholdInterest contextRef="PAsOn03_31_2016" unitRef="USD" decimals="0">1968734</tgtx:LeaseholdInterest>
    <tgtx:LeaseholdInterest contextRef="PAsOn12_31_2015" unitRef="USD" decimals="0">0</tgtx:LeaseholdInterest>
    <tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows contextRef="P01_01_2016To03_31_2016">18 to 24 months</tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows>
    <tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows contextRef="P01_01_2015To03_31_2015">18 to 24 months</tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows>
    <tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows contextRef="P01_01_2015To12_31_2015">18 to 24 months</tgtx:PeriodAnticipatedSufficientToFundOperatingCashFlows>
    <tgtx:BusinessDescriptionPolicyTextBlock contextRef="P01_01_2016To03_31_2016">&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We are a biopharmaceutical company focused on&#13;the acquisition, development and commercialization of novel treatments for B-cell malignancies and autoimmune diseases. Currently,&#13;the Company is developing two therapies targeting hematologic malignancies. TG-1101 (ublituximab) is a novel, glycoengineered&#13;monoclonal antibody that targets a specific and unique epitope on the CD20 antigen found on mature B-lymphocytes. We are also&#13;developing TGR-1202, an orally available PI3K delta inhibitor. The delta isoform of PI3K is strongly expressed in cells of hematopoietic&#13;origin and is believed to be important in the proliferation and survival of B-lymphocytes. Both TG-1101 and TGR-1202 are in clinical&#13;development for patients with hematologic malignancies. The Company also has pre-clinical programs to develop IRAK4 (interleukin-1&#13;receptor-associated kinase 4) inhibitors, BET (Bromodomain and Extra Terminal) inhibitors, and anti-PD-L1 and anti-GITR antibodies.&lt;/p&gt;&#13;&#13;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;We also actively evaluate complementary products,&#13;technologies and companies for in-licensing, partnership, acquisition and/or investment opportunities. To date, we have not received&#13;approval for the sale of any of our drug candidates in any market and, therefore, have not generated any product sales from our&#13;drug candidates.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;The accompanying unaudited condensed consolidated&#13;financial statements were prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial&#13;information and with the instructions to Quarterly Report on Form 10-Q and Article&amp;#160;10 of Regulation&amp;#160;S-X of the Exchange&#13;Act. Accordingly, they may not include all of the information and footnotes required by GAAP for complete financial statements.&#13;All adjustments that are, in the opinion of management, of a normal recurring nature and are necessary for a fair presentation&#13;of the condensed consolidated financial statements have been included. Nevertheless, these condensed consolidated financial statements&#13;should be read in conjunction with the audited consolidated financial statements contained in our Annual Report on Form 10-K for&#13;the year ended December 31, 2015. The accompanying condensed December 31, 2015 balance sheet has been derived from these statements.&#13;The results of operations for the three and six months ended June 30, 2016 are not necessarily indicative of the results that may&#13;be expected for the entire fiscal year or any other interim period.&lt;/p&gt;&#13;&#13;&lt;p style="font: 8pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;</tgtx:BusinessDescriptionPolicyTextBlock>
</xbrli:xbrl>
