Consolidated Statements of Operations and Comprehensive Loss - USD ($)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Revenue	$ 219,638,000	$ 299,489,000	$ 271,893,000
Cost of revenue:
Total cost of revenue	120,261,000	164,993,000	138,948,000
Gross profit	99,377,000	134,496,000	132,945,000
Operating expenses:
Research and development (includes related party expenses of $12,771, $10,709 and $23,954, respectively)	205,361,000	222,596,000	189,377,000
Sales and marketing	85,600,000	119,927,000	100,338,000
General and administrative	129,772,000	115,984,000	97,383,000
Restructuring and other charges	8,368,000	0	0
Goodwill impairment	351,744,000	0	0
Total operating expenses	780,845,000	458,507,000	387,098,000
Loss from operations	(681,468,000)	(324,011,000)	(254,153,000)
Other income (expense):
Interest income, net	14,331,000	9,676,000	277,000
Change in fair value of warrant liabilities	0	0	32,989,000
Other income (expense), net	506,000	(93,000)	(83,000)
Loss before income taxes	(666,631,000)	(314,428,000)	(220,970,000)
Provision for (benefit from) income taxes	73,000	(2,772,000)	(3,480,000)
Net loss	(666,704,000)	(311,656,000)	(217,490,000)
Other comprehensive income (loss), net of tax	620,000	(799,000)	179,000
Total comprehensive loss	$ (666,084,000)	$ (312,455,000)	$ (217,311,000)
Net loss per share of Class A and Class B common stock attributable to common stockholders:
Basic (in usd per share)	$ (1.40)	$ (0.69)	$ (0.60)
Diluted (in usd per share)	$ (1.40)	$ (0.69)	$ (0.60)
Weighted-average shares used to compute net loss per share:
Basic (in shares)	475,982,265	451,504,377	361,528,119
Diluted (in shares)	475,982,265	451,504,377	361,528,119
Service
Revenue:
Revenue	$ 191,816,000	$ 265,840,000	$ 257,749,000
Cost of revenue:
Total cost of revenue	108,116,000	150,595,000	135,027,000
Product
Revenue:
Revenue	27,822,000	33,649,000	14,144,000
Cost of revenue:
Total cost of revenue	$ 12,145,000	$ 14,398,000	$ 3,921,000