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Income Taxes - Schedule of Significant Components of Net Deferred Tax Assets (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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| Income Tax Disclosure [Abstract] | ||
| Capitalized start-up costs | $ 128thld_DeferredTaxAssetsCapitalizedStartUpCosts | $ 179thld_DeferredTaxAssetsCapitalizedStartUpCosts |
| Net operating loss carryforwards | 33,049us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 31,988us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Research and development credits | 6,616us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 5,427us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
| Deferred stock compensation | 3,933us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 3,327us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| Deferred revenue | 26,151us-gaap_DeferredTaxAssetsDeferredIncome | 21,151us-gaap_DeferredTaxAssetsDeferredIncome |
| Other (accruals, reserves, depreciation) | 1,019us-gaap_DeferredTaxAssetsOther | 1,069us-gaap_DeferredTaxAssetsOther |
| Total deferred tax assets | 70,896us-gaap_DeferredTaxAssetsGross | 63,141us-gaap_DeferredTaxAssetsGross |
| Less: Valuation allowance | $ (70,896)us-gaap_DeferredTaxAssetsValuationAllowance | $ (63,141)us-gaap_DeferredTaxAssetsValuationAllowance |
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- Definition
Deferred tax assets capitalized start up costs. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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