Consolidated Statements of Operations (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
License revenue	$ 152,381us-gaap_LicensesRevenue	$ 152,381us-gaap_LicensesRevenue
Research and development:
Noncash stock expense associated with in-licensing agreements	5,350,094tgtx_NonCashStockExpense	0tgtx_NonCashStockExpense
Noncash compensation	8,731,566	1,041,519
Other research and development	26,004,687	12,621,161
Total research and development	40,086,347us-gaap_ResearchAndDevelopmentExpense	13,662,680us-gaap_ResearchAndDevelopmentExpense
General and administrative:
Noncash compensation	12,373,726	4,161,629
Other general and administrative	3,413,400	2,496,461
Total general and administrative	15,787,126us-gaap_GeneralAndAdministrativeExpense	6,658,090us-gaap_GeneralAndAdministrativeExpense
Impairment of in-process research and development	0	2,797,600
Total costs and expenses	55,873,473us-gaap_OperatingExpenses	23,118,370us-gaap_OperatingExpenses
Operating loss	(55,721,092)us-gaap_OperatingIncomeLoss	(22,965,989)us-gaap_OperatingIncomeLoss
Other (income) expense:
Interest income	(55,049)us-gaap_InterestIncomeOther	(30,822)us-gaap_InterestIncomeOther
Other income	(95,427)us-gaap_OtherIncome	(108,894)us-gaap_OtherIncome
Interest expense	930,701us-gaap_InterestExpense	952,888us-gaap_InterestExpense
Change in fair value of notes payable	(720,040)	(3,300,951)
Total other expense (income), net	60,185us-gaap_NonoperatingIncomeExpense	(2,487,779)us-gaap_NonoperatingIncomeExpense
Net loss	$ (55,781,277)us-gaap_ProfitLoss	$ (20,478,210)us-gaap_ProfitLoss
Basic and diluted net loss per common share (in dollars per share)	$ (1.64)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.81)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average shares used in computing basic and diluted net loss per common share (in shares)	34,068,926	25,413,964

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Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

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