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INCOME TAXES (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Deferred Tax Assets And Liabilities [Line Items]    
Deferred Tax Assets, Valuation Allowance $ 69,083,769us-gaap_DeferredTaxAssetsValuationAllowance $ 46,282,857us-gaap_DeferredTaxAssetsValuationAllowance
Operating Loss Carry forwards Expiration Period 2034  
Us Federal Income Tax [Member]    
Deferred Tax Assets And Liabilities [Line Items]    
Operating Loss Carryforwards $ 136,017,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= tgtx_UsFederalIncomeTaxMember
 
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
/ us-gaap_IncomeTaxAuthorityAxis
= tgtx_UsFederalIncomeTaxMember