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Significant Components of Company's Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets |  |  |  |
Operating loss carryforward | $ 8,933 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |  | $ 8,544 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Accrued expenses | 706 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |  | 490 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |
Temporary differences related to R&D expenses | 922 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |  | 1,045 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
Equity-based compensation | 2,563 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits |  | 2,085 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits |
Tax credit carry forward | 800 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |  | 622 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
Other | 273 us-gaap_DeferredTaxAssetsOther |  | 152 us-gaap_DeferredTaxAssetsOther |
Total gross deferred tax assets | 14,197 us-gaap_DeferredTaxAssetsGross |  | 12,938 us-gaap_DeferredTaxAssetsGross |
Valuation allowance | (11,930)us-gaap_DeferredTaxAssetsValuationAllowance |  | (8,526)us-gaap_DeferredTaxAssetsValuationAllowance |
Net deferred tax assets | 2,267 us-gaap_DeferredTaxAssetsNet |  | 4,412 us-gaap_DeferredTaxAssetsNet |
Deferred tax liabilities |  |  |  |
Other | 26 us-gaap_DeferredTaxLiabilitiesOther |  | 73 us-gaap_DeferredTaxLiabilitiesOther |
Intangible assets | 1,843 us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets |  |  |
Total gross deferred tax liabilities | 1,869 us-gaap_DeferredTaxLiabilities |  | 73 us-gaap_DeferredTaxLiabilities |
Net deferred tax assets | $ 398 us-gaap_DeferredTaxAssetsLiabilitiesNet | [1] | $ 4,339 us-gaap_DeferredTaxAssetsLiabilitiesNet | [1]
[1] | Net deferred tax for the year ended December 31, 2013 from domestic and foreign jurisdictions was $2,999 and $1,340, respectively. Net deferred tax for the year ended December 31, 2014 from domestic and foreign jurisdictions was $0 and $398, respectively.

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 + Details
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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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- 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. + 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 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit 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 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. + 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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