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Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | ---
Deferred tax assets |  |
Research tax credits | $ 19,063 | $ 6,303
Intangible assets | 50,564 | 43,626
Net operating loss | 202,906 | 116,619
Share-based compensation | 26,623 | 18,413
Lease liabilities | 16,638 | 17,194
Other | 7,303 | 7,060
Subtotal | 323,097 | 209,215
Valuation allowance | (303,287) | (187,831)
Deferred tax liabilities |  |
Depreciation | (1,214) | (1,833)
Right-of-use assets | (13,908) | (15,409)
Other | (4,688) | (4,142)
Net Deferred tax assets/(liabilities), net of valuation allowance | $ 0 | $ 0

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