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Income Tax - Significant Components of Company's 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] | ||
| Tax basis in excess of book value of assets | $ 4,871us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | $ 951us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment |
| Non-capital loss carryforwards | 76,403us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 72,115us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Research and development deductions and credits | 7,464us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 6,857us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
| Stock options | 3,163us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 2,578us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| Restructuring liability | (25)us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges | 1,567us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges |
| Other | 110us-gaap_DeferredTaxAssetsOther | 70us-gaap_DeferredTaxAssetsOther |
| Total deferred tax assets | 91,986us-gaap_DeferredTaxAssetsGross | 84,138us-gaap_DeferredTaxAssetsGross |
| Valuation allowance | $ (91,986)us-gaap_DeferredTaxAssetsValuationAllowance | $ (84,138)us-gaap_DeferredTaxAssetsValuationAllowance |
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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 temporary differences from property, plant, and equipment. No definition available.
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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 before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from restructuring reserve. 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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