v2.4.1.9

Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets |  |
Net operating loss carryforwards | $ 12,849 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 18,895 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Research and development credit carryforwards | 6,392 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 5,189 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Accrued liabilities | 583 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 581 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Deferred revenues | 3,291 us-gaap_DeferredTaxAssetsDeferredIncome | 3,188 us-gaap_DeferredTaxAssetsDeferredIncome
Deferred rent | 191 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent | 210 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent
Intangible assets | 401 us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets | 440 us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Stock-based compensation | 4,149 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 1,714 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Other | 903 us-gaap_DeferredTaxAssetsOther | 521 us-gaap_DeferredTaxAssetsOther
Gross deferred tax assets | 28,759 us-gaap_DeferredTaxAssetsGross | 30,738 us-gaap_DeferredTaxAssetsGross
Valuation allowance | (3,079)us-gaap_DeferredTaxAssetsValuationAllowance | (27,181)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax assets | 25,680 us-gaap_DeferredTaxAssetsNet | 3,557 us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities |  |
Fixed assets | (3,039)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (3,483)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Intangible assets | (2)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | (34)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Total deferred tax liabilities | (3,041)us-gaap_DeferredTaxLiabilities | (3,517)us-gaap_DeferredTaxLiabilities
Net deferred tax assets | $ 22,639 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 40 us-gaap_DeferredTaxAssetsLiabilitiesNet

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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