Net Loss Per Share - Schedule of Basic And Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net loss	$ (217,490)	$ (183,619)	$ (250,863)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	361,528,119	99,660,786	88,201,337
Net loss per share:
Net loss per share, basic and diluted	$ (0.60)	$ (1.84)	$ (2.84)
Class A Common Stock [Member]
Numerator:
Net loss	$ (68,620)	$ (37,070)	$ (49,094)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	114,064,921	20,121,419	17,261,145
Net loss per share:
Net loss per share, basic and diluted	$ (0.60)	$ (1.84)	$ (2.84)
Class B Common Stock [Member]
Numerator:
Net loss	$ (148,870)	$ (146,549)	$ (201,769)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	247,463,198	79,539,367	70,940,192
Net loss per share:
Net loss per share, basic and diluted	$ (0.60)	$ (1.84)	$ (2.84)