Annual report pursuant to Section 13 and 15(d)

Organization and Description of the Business (Details)

v2.4.1.9
Organization and Description of the Business (Details) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended
Dec. 10, 2014
Mar. 06, 2014
Feb. 05, 2014
Oct. 30, 2013
Mar. 06, 2014
Dec. 31, 2014
item
Dec. 31, 2013
Dec. 31, 2012
Organization and Description of the Business                
Number of operating segments           1us-gaap_NumberOfOperatingSegments    
Reverse stock split ratio       0.1613us-gaap_StockholdersEquityNoteStockSplitConversionRatio1        
Public Offering                
Issuance of common stock in public offering (in shares) 11,250,000trvn_StockIssuedDuringPeriodSharesNewIssuesPublicOffering              
Issuance of common stock underwriters allotment option (in shares) 1,598,000trvn_StockIssuedDuringPeriodSharesNewIssuesExerciseOfUnderwritersAllotmentOption              
Issuance of common stock (in shares) 12,848,000us-gaap_StockIssuedDuringPeriodSharesNewIssues 270,449us-gaap_StockIssuedDuringPeriodSharesNewIssues 9,250,000us-gaap_StockIssuedDuringPeriodSharesNewIssues          
Public offering price (in dollars per share) $ 4.00us-gaap_EquityIssuancePerShareAmount $ 7.00us-gaap_EquityIssuancePerShareAmount $ 7.00us-gaap_EquityIssuancePerShareAmount          
Aggregate gross proceeds from shares sold $ 51,400,000us-gaap_StockIssuedDuringPeriodValueNewIssues $ 1,900,000us-gaap_StockIssuedDuringPeriodValueNewIssues $ 64,800,000us-gaap_StockIssuedDuringPeriodValueNewIssues          
Number of outstanding warrants not exercised as part of the IPO         22,580trvn_OutstandingWarrantsNotExercisedAsPartOfInitialPublicOffering      
Shares of common stock issued upon conversion of outstanding convertible preferred stock and net exercise of a portion of warrants         15,728,286trvn_StockIssuedDuringPeriodSharesConversionOfConvertibleSecuritiesAndWarrantsExercised      
Payment of underwriting discounts and commissions 3,100,000us-gaap_PaymentsOfStockIssuanceCosts       4,700,000us-gaap_PaymentsOfStockIssuanceCosts      
Offering expense 600,000trvn_OfferingExpenses       2,500,000trvn_OfferingExpenses      
Net offering proceeds after deducting underwriting discounts and commissions and offering expenses         59,534,984us-gaap_ProceedsFromIssuanceInitialPublicOffering      
Proceeds from issuance of common stock, net 47,700,000us-gaap_ProceedsFromIssuanceOfCommonStock         107,290,323us-gaap_ProceedsFromIssuanceOfCommonStock    
Liquidity                
Accumulated deficit           (131,969,725)us-gaap_RetainedEarningsAccumulatedDeficit (82,268,850)us-gaap_RetainedEarningsAccumulatedDeficit  
Net loss           (49,700,875)us-gaap_NetIncomeLoss (23,251,435)us-gaap_NetIncomeLoss  
Cash and cash equivalents           36,205,559us-gaap_CashAndCashEquivalentsAtCarryingValue 37,965,198us-gaap_CashAndCashEquivalentsAtCarryingValue 6,738,659us-gaap_CashAndCashEquivalentsAtCarryingValue
Marketable securities           70,698,640us-gaap_MarketableSecurities    
Amount available for withdrawal under credit facility           $ 16,500,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity