Annual report pursuant to Section 13 and 15(d)

Stockholder's Equity (Deficit) (Details 3)

v2.4.1.9
Stockholder's Equity (Deficit) (Details 3) (USD $)
0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Dec. 10, 2014
Mar. 06, 2014
Dec. 31, 2014
Dec. 31, 2013
Nov. 16, 2009
Jun. 30, 2009
Jan. 31, 2008
Jan. 07, 2008
Sep. 30, 2008
Jul. 08, 2010
Jan. 31, 2014
Nov. 30, 2013
item
May 03, 2013
Dec. 15, 2011
Jul. 08, 2011
Jan. 04, 2008
May 31, 2013
Redeemable convertible preferred stock and stockholder's equity                                  
Par value (in dollars per share)     $ 1.00us-gaap_SharePrice                            
Proceeds from issuance of redeemable convertible preferred stock       $ 59,918,917us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock                          
Outstanding warrants (in shares)     30,258us-gaap_ClassOfWarrantOrRightOutstanding                            
Redeemable convertible preferred stock, conversion ratio     0.1613trvn_TemporaryEquityConversionRatio 0.1613trvn_TemporaryEquityConversionRatio                          
Annual rate of noncumulative dividends on preferred stock (as a percent)       8.00%us-gaap_PreferredStockDividendRatePercentage                          
Dividend declared (in dollars per share)       $ 0.00us-gaap_PreferredStockDividendsPerShareDeclared                          
Liquidation preference (in dollars per share)     $ 1.632us-gaap_TemporaryEquityLiquidationPreferencePerShare                            
Common Stock                                  
Common stock, shares authorized     100,000,000us-gaap_CommonStockSharesAuthorized 132,000,000us-gaap_CommonStockSharesAuthorized                          
Restricted Stock Agreements                                  
Share price (in dollars per share)     $ 1.00us-gaap_SharePrice                            
Payment of recorded expense 3,100,000us-gaap_PaymentsOfStockIssuanceCosts 4,700,000us-gaap_PaymentsOfStockIssuanceCosts                              
Initial public offering                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Minimum initial public offering price required to automatically convert preferred stock into common stock (in dollars per share)     $ 4.00trvn_MinimumSharePriceInInitialPublicOfferingRequiredToAutomaticallyConvertPreferredStockToCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Minimum net proceed from initial public offering required to automatically convert preferred stock into common stock     40,000,000trvn_MinimumProceedsFromIssuanceInitialPublicOfferingRequiredToAutomaticallyConvertPreferredStockToCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Minimum percentage of stockholders whose affirmative vote or written consent is required to automatically convert preferred stock into common stock     60.00%trvn_MinimumPercentageOfStockHoldersWhoseAffirmativeVoteOrWrittenConsentRequiredToAutomaticallyConvertPreferredStockToCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Common Stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares of common stock that may be purchased by warrant     20,161us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                           
Intrinsic value     0trvn_EquityIntrinsicValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                           
Series B-1 warrants                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares of common stock that may be purchased by warrant                   1,700,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= trvn_SeriesB1WarrantsMember
             
Warrants term     10 years                            
Outstanding warrants (in shares)     1,100,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= trvn_SeriesB1WarrantsMember
                           
Redeemable convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Number of board of directors that stockholders are entitled to elect     5trvn_NumberOfBoardOfDirectorsThatStockholdersAreEntitledToElect
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
                           
Minimum percentage of stockholders required to redeem stock     60.00%trvn_PercentageOfMinimumStockholdersRequiredToRedeemStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
                           
Number of annual installments to redeem stock     3trvn_NumberOfAnnualInstallmentsToRedeemStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
                           
Series A convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares authorized     0us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
25,074,999us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
                      25,000,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
 
Shares issued     0us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
25,074,999us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
1,000,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
11,034,375us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
4,514,062us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
501,562us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
8,025,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
               
Par value (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
               
Proceeds from issuance of redeemable convertible preferred stock         1,000,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
11,034,375us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
4,514,062us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
501,562us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
8,025,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
               
Offering costs         3,398trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
561trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
200,137trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
  2,154trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesAPreferredStockMember
               
Restricted Stock Agreements                                  
Share 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 convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares authorized     0us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
35,500,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
          35,000,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
             
Shares issued     0us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
30,800,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
          17,500,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
      7,600,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
5,700,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
   
Par value (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
   
Proceeds from issuance of redeemable convertible preferred stock                   17,500,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
             
Offering costs                   38,568trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
             
Shares of common stock that may be purchased by warrant     125,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
                           
Number of warrant holders exercising the right                       1trvn_ClassOfWarrantOrRightNumberOfWarrantHoldersExercisingTheRights
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
         
Number of shares issued on exercise of warrants                     1,100,000trvn_ClassOfWarrantOrRightNumberOfSecuritiesIssuedForExerciseOfWarrantsOrRights
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
550,000trvn_ClassOfWarrantOrRightNumberOfSecuritiesIssuedForExerciseOfWarrantsOrRights
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
         
Outstanding warrants (in shares)     1,225,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBPreferredStockMember
                           
Restricted Stock Agreements                                  
Share 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
   
Series B 1 convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares authorized     0us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
6,000,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
          4,300,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
             
Shares issued     0us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
4,750,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
                  2,400,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
1,800,000us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
   
Par value (in dollars per share)                           $ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
   
Shares of common stock that may be purchased by warrant     1,650,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
                           
Exercise price of warrants (in dollars per share)     $ 1.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
                           
Estimated fair value of the preferred stock warrants     1,347,428trvn_ClassOfWarrantOrRightEstimatedFairValue
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
                           
Restricted Stock Agreements                                  
Share price (in dollars per share)                           $ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
$ 1.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesB1PreferredStockMember
   
Series C convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Shares authorized     0us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
37,000,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
                        37,000,000us-gaap_TemporaryEquitySharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
Shares issued     0us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
36,764,704us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
                36,764,704us-gaap_TemporaryEquitySharesIssued
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
       
Par value (in dollars per share)                         $ 1.632us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
       
Proceeds from issuance of redeemable convertible preferred stock                         59,999,997us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
       
Offering costs                         81,080trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
       
Restricted Stock Agreements                                  
Share price (in dollars per share)                         $ 1.632us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesCPreferredStockMember
       
Series B and B 1 convertible preferred stock                                  
Redeemable convertible preferred stock and stockholder's equity                                  
Offering costs                           $ 4,989trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBAndB1PreferredStockMember
$ 8,229trvn_OfferingCosts
/ us-gaap_StatementClassOfStockAxis
= trvn_RedeemableConvertibleSeriesBAndB1PreferredStockMember