Intangible Assets - Additional Information (Detail) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Other direct cost of revenues | $ 1,231,000 | $ 1,416,000 | $ 1,731,000 |
| Amortization expense after year one | $ 0 | ||
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- Definition Finite-Lived Intangible Assets, Amortization Expense, After Year One No definition available.
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| X | ||||||||||
- Definition Amount of expense for allocation of cost of intangible asset over its useful life directly used in production of good and rendering of service. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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