Income Taxes - Schedule of Provision For (Benefit From) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Domestic	$ (221,212)	$ (183,619)	$ (250,863)
Foreign	242	0	0
Loss before income taxes	$ (220,970)	$ (183,619)	$ (250,863)