Annual report pursuant to Section 13 and 15(d)

2008 and 2013 Equity Incentive Plans (Details 3)

v2.4.1.9
2008 and 2013 Equity Incentive Plans (Details 3) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Nov. 16, 2009
Jun. 30, 2009
Sep. 30, 2008
Jan. 31, 2008
Jan. 07, 2008
Dec. 15, 2011
Jul. 08, 2011
Jul. 08, 2010
May 03, 2013
Dec. 31, 2012
2008 and 2013 Equity Incentive Plans                        
Per share price of Company's closing stock price (in dollars per share) 1.00us-gaap_SharePrice                      
Shares of common stock reserved for issuance                        
Common stock options outstanding (in shares) 3,574,450us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber                      
Common stock options and restricted stock available for future grant (2013 Plan) (in shares) 829,364us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant                      
Common stock warrants outstanding (in shares) 30,258us-gaap_ClassOfWarrantOrRightOutstanding                      
Total shares of common stock reserved for issuance 4,434,072us-gaap_CommonStockCapitalSharesReservedForFutureIssuance                      
Estimated                        
Weighted-average assumptions:                        
Estimated annual forfeiture rate (as a percent) 7.00%trvn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEstimatedForfeitureRate
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
5.00%trvn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEstimatedForfeitureRate
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
                   
Series A convertible preferred stock                        
2008 and 2013 Equity Incentive Plans                        
Per share price of Company's closing stock price (in dollars per share)     $ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
         
Series B 1 convertible preferred stock                        
2008 and 2013 Equity Incentive Plans                        
Per share price of Company's closing stock price (in dollars 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                        
2008 and 2013 Equity Incentive Plans                        
Per share price of Company's closing stock price (in dollars 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
   
Shares of common stock reserved for issuance                        
Common stock warrants outstanding (in shares) 1,225,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
                     
Series C convertible preferred stock                        
2008 and 2013 Equity Incentive Plans                        
Per share price of Company's closing stock price (in dollars per share)                     $ 1.632us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
 
Stock options                        
2008 and 2013 Equity Incentive Plans                        
Intrinsic value of options exercisable 6.4us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                     
Per share price of Company's closing stock price (in dollars per share) 5.98us-gaap_SharePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                     
Weighted average exercise price (in dollars per share) 2.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                     
Per-share weighted-average grant date fair value of options granted (in dollars per share) 4.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
2.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                   
Weighted-average assumptions:                        
Unrecognized compensation expense 6.1us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                     
Weighted average remaining period for recognition of unrecognized compensation expense 2 years 10 months 13 days                      
Shares of common stock reserved for issuance                        
Common stock options outstanding (in shares) 3,574,450us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
2,795,746us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                  1,523,156us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Common stock options and restricted stock available for future grant (2013 Plan) (in shares) 829,364us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
83,465us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                  171,803us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Stock options | Weighted-average                        
Weighted-average assumptions:                        
Risk-free interest rate (as a percent) 1.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
1.52%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
                   
Expected term of options (in years) 5 years 9 months 18 days 6 years 1 month 6 days                    
Expected volatility (as a percent) 75.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
80.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
                   
Dividend yield (as a percent) 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember