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Notes To Financial Statements [Abstract] Deposit for Office Agreement [Member] Deposit for Office Agreement. The North Carolina Lease [Member] The North Carolina Lease. The New Jersey Lease [Member] The New Jersey Lease. Office Agreement with Fortress Biotech [Member] Office Agreement with Fortress Biotech. tgtx_PercentageOfOccupancy Percentage of Occupancy Represents the percentage of square footage occupied. Share-Based Payment Arrangement, Activity [Table Text Block] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Expired or Forfeited (in shares) After 2029 tgtx_LesseeOperatingLeaseLiabilityToBePaidYearFiveAndTherafter Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth year and thereafter. 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Document Quarterly Report Entity Incorporation, State or Country Code us-gaap_DebtInstrumentCarryingAmount Long-Term Debt, Gross Accounting Policies [Abstract] Document Transition Report Entity Interactive Data Current Security Exchange Name Title of 12(b) Security tgtx_NonCashCompensationSellingGeneralAndAdministrativeExpenses Noncash compensation The aggregate compensation expense related to the grants of stock options and restricted stock that is attributable to selling general and administrative expenses during the reporting period. us-gaap_ProceedsFromIssuanceOfLongTermDebt Proceeds from Issuance of Long-Term Debt Noncash compensation The aggregate compensation expense related to the grants of stock options and restricted stock that is attributable to research and development expenses during the reporting period. Nonmonetary Transaction Type [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Nonmonetary Transaction Type [Axis] Stock-based Compensation Expense Capitalized Into Inventory [Member] Represent stock-based compensation expense that was capitalized into inventory. tgtx_ChangeInFairValueOfNotesPayable Change in fair value of notes payable The change in fair value of notes payable during the period. tgtx_QualifiedSalesbasedMilestoneRevenue Qualified Sales-based Milestone Revenue Information pertaining to sales-based milestone payments. us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Potentially dilutive securities excluded from calculation (in shares) tgtx_LicenseAndCollaborationAgreementsOnetimeNonrefundablePayment License and Collaboration Agreements, One-time, Non-refundable Payment The amount of a one-time, non-refundable payment made in accordance with commercialization agreements. Briumvi Ublituximab [Member] Represents Briumvi Ublituximab. Commercialization Agreement With Neuraxpharm [Member] Represents Commercialization Agreement With Neuraxpharm. Statement [Table] Statement of Financial Position [Abstract] Weighted-average shares used in computing basic and diluted net loss per common share (in shares) Manhattan and Ariston Pharmaceuticals Merger [Member] Represents Manhattan and Ariston Pharmaceuticals Merger. Warrants to Purchase Common Stock, First Amendment Loan Agreement [Member] Warrants to Purchase Common Stock as part of the first amended loan agreement. tgtx_GrossNetAccruals Gross Net Accruals Gross net accruals. Business Acquisition [Axis] Basic and diluted net loss per common share (in dollars per share) Unvested Restricted Stock [Member] Represents Unvested Restricted Stock. Business Acquisition, Acquiree [Domain] Full Value Awards [Member] Represents full-value awards. The 2022 Incentive Plan [Member] Represents The 2022 Incentive Plan. Statement of Cash Flows [Abstract] Warrants to Purchase Common Stock, Loan agreement [Member] Represents warrants to purchase common stock as part of the loan agreement. The 2012 Incentive Plan [Member] Represents the 2012 incentive plan. tgtx_CommonStockCommissionRate Common Stock, Commission Rate Refers to the percent of commission of gross proceeds from the sale of common stock sold paid to agents. Lease Contractual Term [Domain] Statement of Stockholders' Equity [Abstract] Lease Contractual Term [Axis] The 2022 ATM [Member] Represents the 2022 ATM. 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Proceeds from debt financings Precision License Agreement [Member] Represents the precision license agreement. tgtx_LicenseAgreementAmountPaidUpfront License Agreement, Amount Paid Upfront Represents the amount paid upfront for a license agreement. Warrants to Purchase Common Stock, First Amendment [Member] Warrants to Purchase Common Stock as part of first amendment. tgtx_ProductSalesNetRelatedToPerformanceObligations Product Sales, Net Related to Performance Obligations Represents product sales, net related to performance obligations. Other Revenue [Member] Represents other revenue. License Revenue [Member] Represents license revenue. tgtx_InvestmentPurchasedBalanceShares Investment Purchased Balance Shares (in shares) Represents investment purchased balance in shares. tgtx_InvestmentPurchasedBalancePricePerShare Investment Purchased Balance Price Per Share (in dollars per share) Represents investment purchased balance, price per share. 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