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Income Taxes (Details 2) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Percent of pre-tax income: | |||
| U.S. federal statutory income tax rate (as a percent) | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | |
| Permanent Differences (as a percent) | (0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | (0.50%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | |
| State taxes, net of federal benefit (as a percent) | 6.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 6.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | |
| Research and development credit (as a percent) | 3.90%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment | 1.90%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment | |
| Change in valuation allowance (as a percent) | (43.80%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | (41.90%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | |
| Effective income tax rate (as a percent) | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | |
| Operating loss carryforwards | |||
| Interest and penalties related to uncertain tax positions | $ 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | ||
| Research and development credit retroactively reinstated | 1,800,000trvn_DeferredTaxAssetsReinstatedTaxCreditCarryforwardsResearch | 1,000,000trvn_DeferredTaxAssetsReinstatedTaxCreditCarryforwardsResearch | 1,000,000trvn_DeferredTaxAssetsReinstatedTaxCreditCarryforwardsResearch |
| Research and development. | |||
| Operating loss carryforwards | |||
| Uncertain tax positions |
0trvn_LiabilityForUncertainTaxPositions / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
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| U.S. federal | |||
| Operating loss carryforwards | |||
| Net operating loss carryforwards |
22,800,000us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
12,700,000us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
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| U.S. federal | Research and development. | |||
| Operating loss carryforwards | |||
| Tax credit carryforwards |
4,700,000us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
2,500,000us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
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| U.S. State | |||
| Operating loss carryforwards | |||
| Net operating loss carryforwards |
22,800,000us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |
12,700,000us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |
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| U.S. State | Research and development. | |||
| Operating loss carryforwards | |||
| Tax credit carryforwards |
$ 700,000us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
$ 400,000us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
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| X | ||||||||||
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- Definition
Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards which is been retroactively reinstated. No definition available.
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- Details
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- Definition
Represents the amount recognized for uncertain tax positions as of the balance sheet date. No definition available.
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research and development expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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