Income Taxes - Summary of the Components of the Company's Loss Before Provision For (Benefit From) Income Taxes (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Mar. 31, 2019 |
|
| Net income (loss) | $ (183,619) | $ (250,863) | $ (183,533) |
| Domestic | |||
| Net income (loss) | $ (183,619) | $ (250,863) | $ (183,533) |