Basic and Diluted Net Earnings Per Share - Additional Information (Detail) - shares |
Sep. 30, 2019 |
Sep. 30, 2018 |
|---|---|---|
| Earnings Per Share Basic And Diluted [Abstract] | ||
| Option to purchase shares of common stock outstanding | 1,834,472 | 1,989,472 |
| 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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