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Financial Instruments - Summary of Financial Instruments Measured at Fair Value (Parenthetical) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Other Investments- equity securities [Member] |  |
Disclosure Of Financial Instruments [Line Items] |  |
Risk adjusted discount rate, Significant unobservable inputs | 17.00% | 17.00%
Other Investments- equity securities [Member] | Bottom of Range [Member] |  |
Disclosure Of Financial Instruments [Line Items] |  |
Forecast annual revenue growth rate, Significant unobservable inputs | 4.00% | (47.00%)
Forecast EBITDA margin, Significant unobservable inputs | (3.00%) | (13.00%)
Other Investments- equity securities [Member] | Top of Range [Member] |  |
Disclosure Of Financial Instruments [Line Items] |  |
Forecast annual revenue growth rate, Significant unobservable inputs | 25.00% | 50.00%
Forecast EBITDA margin, Significant unobservable inputs | 25.00% | 26.00%
Other Liabilities Related to Business Combination [Member] |  |
Disclosure Of Financial Instruments [Line Items] |  |
Risk adjusted discount rate, Significant unobservable inputs | 10.20% | 10.20%
Expected cash flow | $ 17,054 | $ 16,710

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