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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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|---|---|---|
| Deferred tax assets: | ||
| Net operating loss carryforwards | $ 88,086us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 85,912us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Research credit carryforwards | 13,645us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 13,481us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
| Other, net | 3,529us-gaap_DeferredTaxAssetsOther | 3,962us-gaap_DeferredTaxAssetsOther |
| Deferred revenue | 666us-gaap_DeferredTaxAssetsDeferredIncome | 2,116us-gaap_DeferredTaxAssetsDeferredIncome |
| Total deferred tax assets | 105,926us-gaap_DeferredTaxAssetsGross | 105,471us-gaap_DeferredTaxAssetsGross |
| Valuation allowance | (105,926)us-gaap_DeferredTaxAssetsValuationAllowance | (105,471)us-gaap_DeferredTaxAssetsValuationAllowance |
| Net deferred tax assets | $ 0us-gaap_DeferredTaxAssetsNet | $ 0us-gaap_DeferredTaxAssetsNet |
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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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- Details
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- Definition
Amount after 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 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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