Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details 5)

v2.4.1.9
Summary of Significant Accounting Policies (Details 5) (USD $)
12 Months Ended 24 Months Ended 12 Months Ended
Dec. 31, 2014
item
Dec. 31, 2014
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Dec. 31, 2013
Dec. 15, 2011
Jul. 08, 2011
Jul. 08, 2010
Fair value assumptions            
Fair value of underlying instrument (in dollar per share) $ 1.00us-gaap_SharePrice $ 1.00us-gaap_SharePrice        
Segment Information            
Number of operating segments 1us-gaap_NumberOfOperatingSegments          
Stock-Based Compensation            
Number of stock-based compensation plans 1trvn_NumberOfStockbasedCompensationPlans 1trvn_NumberOfStockbasedCompensationPlans        
Basic and diluted net loss per common share calculation:            
Difference between basic and diluted net loss per share of Common Stock   $ 0.00trvn_DifferenceBetweenBasicAndDilutedNetLossPerShare        
Series B 1 convertible preferred stock            
Fair value assumptions            
Fair value of underlying instrument (in dollar per share)       $ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
 
Series B convertible preferred stock            
Fair value assumptions            
Fair value of underlying instrument (in dollar per share)       $ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
Significant Unobservable Inputs (Level 3) | Warrants | Series B 1 convertible preferred stock            
Fair value assumptions            
Estimated remaining term     3 months      
Dividend yield (as a percent)     0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
     
Risk-free interest rate (as a percent)     0.38%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
     
Fair value of underlying instrument (in dollar per share)     $ 7.00us-gaap_SharePrice
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
     
Volatility (as a percent)     71.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
     
Significant Unobservable Inputs (Level 3) | Warrants | Series B convertible preferred stock            
Fair value assumptions            
Estimated remaining term     8 years 4 months 24 days      
Dividend yield (as a percent)     0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
     
Risk-free interest rate (as a percent)     2.75%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
     
Fair value of underlying instrument (in dollar per share)     $ 7.00us-gaap_SharePrice
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
     
Volatility (as a percent)     70.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
     
Significant Unobservable Inputs (Level 3) | Warrants | Common Stock            
Fair value assumptions            
Estimated remaining term 7 years 4 months 2 days          
Dividend yield (as a percent) 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
         
Risk-free interest rate (as a percent) 1.99%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
         
Fair value of underlying instrument (in dollar per share) $ 5.98us-gaap_SharePrice
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
$ 5.98us-gaap_SharePrice
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
       
Volatility (as a percent) 72.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember