Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands |
6 Months Ended | 12 Months Ended |
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Jun. 30, 2017 |
Dec. 31, 2016 |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Number of shares, Outstanding, Beginning Balance | 1,930,600 | |
| Number of shares, Granted | 2,119,699 | |
| Number of shares, Canceled | (20,825) | |
| Number of shares, Outstanding, Ending Balance | 4,029,474 | 1,930,600 |
| Number of shares, Exercisable at June 30, 2017 | 0 | |
| Weighted average exercise price per share outstanding, Beginning balance | $ 4.45 | |
| Weighted average exercise price per share, Granted | 13.29 | |
| Weighted average exercise price per share, Canceled | 5.85 | |
| Weighted average exercise price per share outstanding, Ending balance | $ 9.09 | $ 4.45 |
| Aggregate intrinsic value, Outstanding at June 30, 2017 | $ 8,018 | |
| Weighted average remaining contractual life, Outstanding | 9 years 3 months 19 days | 9 years 1 month 6 days |
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- References No definition available.
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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