Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue (related party amounts of $8,069 and $8,554 for the three months ended December 31, 2021 and 2020, respectively, and $29,281 and $30,221 for the nine months ended December 31, 2021 and 2020, respectively)	$ 56,891	$ 55,477	$ 171,334	$ 155,338
Cost of revenue (related party amounts of $(54) and $59 for the three months ended December 31, 2021 and 2020, respectively, and $209 and $(592) for the nine months ended December 31, 2021 and 2020, respectively)	29,628	30,089	85,446	82,861
Gross profit	27,263	25,388	85,888	72,477
Operating expenses:
Research and development (related party amounts of $6,300 and $4,238 for the three months ended December 31, 2021 and 2020, respectively, and $18,185 and $10,687 for the nine months ended December 31, 2021 and 2020, respectively)	50,298	41,684	139,053	114,260
Sales and marketing	41,979	12,258	70,987	31,242
General and administrative	31,687	16,589	60,547	45,094
Total operating expenses	123,964	70,531	270,587	190,596
Loss from operations	(96,701)	(45,143)	(184,699)	(118,119)
Interest income	76	53	213	195
Change in fair value of warrant liabilities	3,695	0	32,989	0
Other (expense) income, net	22	445	39	1,318
Loss before benefit for income taxes	(92,908)	(44,645)	(151,458)	(116,606)
Benefit for income taxes	3,512	0	3,512	0
Net loss	(89,396)	(44,645)	(147,946)	(116,606)
Other comprehensive (loss) income	(36)	0	(36)	0
Total comprehensive loss	$ (89,432)	$ (44,645)	$ (147,982)	$ (116,606)
Net loss per share of Class A and Class B common stock attributable to common stockholders
Basic and diluted	$ (0.21)	$ (0.46)	$ (0.44)	$ (1.23)
Weighted-average shares used to compute net loss per share, basic and diluted
Basic and diluted	426,591,111	96,974,875	334,491,905	95,185,171