Stock-Based Compensation - Summary of Stock Options Activity (Detail) - $ / shares |
12 Months Ended | |
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Mar. 31, 2018 |
Mar. 31, 2017 |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Stock options granted in period (in shares) | 0 | 0 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | ||
| Outstanding Options, Number, Beginning balance (in shares) | 48,896 | 104,027 |
| Exercised, Outstanding Options, Number (in shares) | (48,896) | (55,131) |
| Outstanding Options, Number, Ending balance (in shares) | 0 | 48,896 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] | ||
| Outstanding Options, Weighted Average Exercise Price, Beginning balance (in dollars per share) | $ 6.38 | $ 7.22 |
| Exercised, Outstanding Options, Weighted Average Exercise Price (in dollars per share) | $ 6.38 | 7.97 |
| Outstanding Options, Weighted Average Exercise Price, Ending balance (in dollars per share) | $ 6.38 | |
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- References No definition available.
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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 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 A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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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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- References No definition available.
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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