Basic and Diluted Net Earnings Per Share - Additional Information (Detail) - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
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| Earnings Per Share, Basic and Diluted [Abstract] | ||
| Option to purchase shares of common stock outstanding | 1,989,472 | 1,454,462 |
| Options excluded from computation of diluted net income or loss per share | 128,284 | 335,682 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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