Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands  | 
12 Months Ended | ||
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Mar. 31, 2022  | 
Mar. 31, 2021  | 
Mar. 31, 2020  | 
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| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Balance at April 1 | $ 1,372 | $ 787 | $ 788 | 
| Additions for tax positions of prior years | 52 | 585 | 0 | 
| Reductions for tax positions of prior years | 0 | 0 | (1) | 
| Balance at March 31 | $ 1,424 | $ 1,372 | $ 787 | 
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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 Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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