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Summary of Net Deferred Tax Assets and Net Deferred Tax Liabilities (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 intangible assets for tax purposes | $ 202us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets | $ 283us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets |
| Reserves not currently deductible | 1,871us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | 1,702us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves |
| Deferred revenue | 8us-gaap_DeferredTaxAssetsDeferredIncome | 8us-gaap_DeferredTaxAssetsDeferredIncome |
| Stock options | 2,911us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 2,565us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| State taxes | 8us-gaap_DeferredTaxAssetsStateTaxes | 7us-gaap_DeferredTaxAssetsStateTaxes |
| Income tax credits | 2,200us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 1,583us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
| Inventory | 1,225us-gaap_DeferredTaxAssetsInventory | 871us-gaap_DeferredTaxAssetsInventory |
| Property and equipment | 280us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 376us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment |
| Other comprehensive income | 222us-gaap_DeferredTaxAssetsOtherComprehensiveLoss | 109us-gaap_DeferredTaxAssetsOtherComprehensiveLoss |
| Unrealized gain on foreign currency | 136us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses | 142us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses |
| Net operating losses | 33,140us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 28,058us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Total deferred tax assets | 42,203us-gaap_DeferredTaxAssetsGross | 35,704us-gaap_DeferredTaxAssetsGross |
| Valuation allowance | (42,069)us-gaap_DeferredTaxAssetsValuationAllowance | (35,566)us-gaap_DeferredTaxAssetsValuationAllowance |
| Net deferred tax assets | 134us-gaap_DeferredTaxAssetsNet | 138us-gaap_DeferredTaxAssetsNet |
| Capitalized intangible assets | (752)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill | (696)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill |
| Other | (59)us-gaap_DeferredTaxLiabilitiesOther | (59)us-gaap_DeferredTaxLiabilitiesOther |
| Total deferred tax liabilities | (811)us-gaap_DeferredIncomeTaxLiabilities | (755)us-gaap_DeferredIncomeTaxLiabilities |
| Net deferred tax liabilities | $ (677)us-gaap_DeferredTaxLiabilities | $ (617)us-gaap_DeferredTaxLiabilities |
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences. 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 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 from intangible assets including goodwill. No definition available.
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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 temporary differences from inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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| X | ||||||||||
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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 from unrealized losses in other comprehensive 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 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 temporary differences from state taxes. No definition available.
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- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. 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 loss reserves other than estimated credit losses. 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 unrealized losses on foreign currency transactions. 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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- Definition
Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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