Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue (related party amounts of $46,064, $39,917 and $26,749 for the years ended March 31, 2022, 2021 and 2020, respectively)	$ 271,893	$ 243,920	$ 305,463
Cost of revenue (related party amounts of $299, $(1,400) and $994 for the years ended March 31, 2022, 2021 and 2020, respectively)	138,948	126,914	168,031
Gross profit	132,945	117,006	137,432
Operating expenses:
Research and development (related party amounts of $23,954, $18,684 and $19,058 for the years ended March 31, 2022, 2021 and 2020, respectively)	189,377	159,856	181,276
Sales and marketing	100,338	43,197	110,519
General and administrative	97,383	99,149	59,392
Restructuring and other charges	0	0	44,692
Total operating expenses	387,098	302,202	395,879
Loss from operations	(254,153)	(185,196)	(258,447)
Other (expense) income:
Interest (expense) income, net	277	255	6,244
Change in fair value of warrant liabilities	32,989	0	0
Other (expense) income, net	(83)	1,322	1,340
Loss before income taxes	(220,970)	(183,619)	(250,863)
Benefit from income taxes	3,480	0	0
Net loss	(217,490)	(183,619)	(250,863)
Other comprehensive income	179	0	0
Total comprehensive loss	$ (217,311)	$ (183,619)	$ (250,863)
Net loss per share of Class A and Class B common stock attributable to common stockholders:
Basic and diluted	$ (0.60)	$ (1.84)	$ (2.84)
Weighted-average shares used to compute net loss per share:
Basic and diluted	361,528,119	99,660,786	88,201,337