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Stock Incentive Plans - Summary of Options Outstanding Vested and Expected to Vest (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Number of Shares, Vested | shares | 990,371
Number of Shares, Expected to vest | shares | 766,938
Number of Shares, Total | shares | 1,757,309
Weighted-Average Exercise Price, Vested | $ / shares | $ 6.05
Weighted-average Exercise Price, Expected to vest | $ / shares | 6.28
Weighted-average Exercise Price, Total | $ / shares | $ 6.15
Weighted-average Remaining Contractual Life (Years), Vested | 6 years 6 months 18 days
Weighted-average Remaining Contractual Life (Years), Expected to vest | 8 years 8 months 12 days
Weighted-average Remaining Contractual Life (Years), Total | 7 years 5 months 27 days
Aggregate Intrinsic Value, Vested | $ | $ 427
Aggregate Intrinsic Value, Expected to vest | $ | 0
Aggregate Intrinsic Value, Total | $ | $ 427

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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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