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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Expenses:    
General and administrative $ 3,135,849us-gaap_GeneralAndAdministrativeExpense $ 2,508,285us-gaap_GeneralAndAdministrativeExpense
Research and development 6,446,193us-gaap_ResearchAndDevelopmentExpense 3,122,749us-gaap_ResearchAndDevelopmentExpense
Change in fair value of contingent consideration 1,048,000tlog_BusinessCombinationGainLossOnContingentConsideration  
Total expenses 10,630,042us-gaap_OperatingExpenses 5,631,034us-gaap_OperatingExpenses
Loss from operations (10,630,042)us-gaap_OperatingIncomeLoss (5,631,034)us-gaap_OperatingIncomeLoss
Change in fair value of derivative liabilities 289,666us-gaap_GainLossOnDerivativeInstrumentsNetPretax 285,021us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Debt exchange expense (818,541)us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost  
Interest and other income 39,194us-gaap_InterestAndOtherIncome 11,946us-gaap_InterestAndOtherIncome
Interest expense (1,563,259)us-gaap_InterestExpense  
Net loss (12,682,982)us-gaap_NetIncomeLoss (5,334,067)us-gaap_NetIncomeLoss
Per share information:    
Net loss per common share: Basic (in dollars per share) $ (0.56)us-gaap_EarningsPerShareBasic $ (0.24)us-gaap_EarningsPerShareBasic
Net loss per common share: Diluted (in dollars per share) $ (0.56)us-gaap_EarningsPerShareDiluted $ (0.25)us-gaap_EarningsPerShareDiluted
Weighted average shares outstanding: Basic (in shares) 22,814,142us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 22,249,474us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted weighted average shares of common stock outstanding (in shares) 22,858,014us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 22,321,473us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net loss (12,682,982)us-gaap_NetIncomeLoss (5,334,067)us-gaap_NetIncomeLoss
Foreign currency losses 21,516us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax  
Unrealized gains/(losses) on available-for-sale securities 9,279us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax (316)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Comprehensive loss $ (12,652,187)us-gaap_ComprehensiveIncomeNetOfTax $ (5,334,383)us-gaap_ComprehensiveIncomeNetOfTax