Significant Components of Company's Deferred Tax Assets (Detail) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
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|---|---|---|---|---|
| Deferred tax assets | ||||
| Operating loss carryforward | $ 9,638 | $ 9,066 | ||
| Accrued expenses | 1,128 | 1,165 | ||
| Temporary differences related to R&D expenses | 1,435 | 1,052 | ||
| Equity-based compensation | 2,685 | 2,625 | ||
| Tax credit carry forward | 1,237 | 875 | ||
| Other | 562 | 529 | ||
| Total gross deferred tax assets | 16,685 | 15,312 | ||
| Valuation allowance | (13,780) | (12,740) | ||
| Net deferred tax assets | 2,905 | 2,572 | ||
| Deferred tax liabilities | ||||
| Intangible assets | 621 | 915 | ||
| Other | 32 | 29 | ||
| Total deferred tax liabilities | 653 | 944 | ||
| Net deferred tax assets | [1] | $ 2,252 | $ 1,628 | |
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