Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue (related party amounts of $10,002 and $9,840 for the three months ended September 30, 2021 and 2020, respectively, and $21,212 and $21,667 for the six months ended September 30, 2021 and 2020, respectively)	$ 55,204	$ 51,804	$ 114,443	$ 99,861
Cost of revenue (related party amounts of $(184) and $(1,063) for the three months ended September 30, 2021 and 2020, respectively, and $264 and $(651) for the six months ended September 30, 2021 and 2020, respectively)	27,276	27,209	55,818	52,773
Gross profit	27,928	24,595	58,625	47,088
Operating expenses:
Research and development (related party amounts of $5,864 and $4,631 for the three months ended September 30, 2021 and 2020, respectively, and $11,886 and $6,449 for the six months ended September 30, 2021 and 2020, respectively)	44,523	38,205	88,755	72,575
Sales and marketing	13,588	8,329	29,007	18,984
General and administrative	16,264	14,315	28,860	28,505
Total operating expenses	74,375	60,849	146,622	120,064
Loss from operations	(46,447)	(36,254)	(87,997)	(72,976)
Interest income	92	69	136	143
Change in fair value of warrant liabilities	29,828	0	29,294	0
Other (expense) income, net	3	(6)	17	872
Provision (benefit) for income taxes	0	0	0	0
Net and comprehensive loss	$ (16,524)	$ (36,191)	$ (58,550)	$ (71,961)
Net loss per share of Class A and Class B common stock attributable to common stockholders
Basic and diluted	$ (0.04)	$ (0.38)	$ (0.20)	$ (0.76)
Weighted-average shares used to compute net loss per share, basic and diluted
Basic and diluted	406,886,060	94,985,853	288,190,872	94,285,431