Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plan (Details)

v2.4.1.9
Employee Benefit Plan (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Defined contribution plan    
Employer matching contribution for employee's contributions of the first 3% of eligible compensation (as a percent) 100.00%trvn_DefinedContributionPlanEmployerMatchingContributionPercentOfMatchForFirstEligibleContributions  
Percentage of eligible compensation, matched 100% by employer 3.00%trvn_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne  
Employer matching contribution for employee's contributions of the next 2% of eligible compensation (as a percent) 50.00%trvn_DefinedContributionPlanEmployerMatchingContributionPercentOfMatchForSecondEligibleContributions  
Percentage of eligible compensation, matched 50% by employer 2.00%trvn_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo  
Company's matching contributions to the plan $ 204,537us-gaap_DefinedContributionPlanCostRecognized $ 175,943us-gaap_DefinedContributionPlanCostRecognized