Equity Incentive Plans and Stock-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Summary of Stock Option Activity and Activity Regarding Shares Available for Grant

Stock option activity and activity regarding shares available for grant under the 2021 Plan are as follows:

	Options Outstanding
	Outstanding Stock Options			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
	(in thousands, except share, years, and per share data)
Balance as of March 31, 2022		73,609,565		$	4.21	6.9		$	35,979
Granted		3,670,200		$	3.69
Exercised		(2,496,363	)	$	1.61
Cancelled/forfeited/expired		(4,937,707	)	$	4.90
Balance as of September 30, 2022		69,845,695		$	4.22		6.4	$	15,324
Vested and exercisable as of September 30, 2022		45,133,259		$	4.05		5.2	$	10,436

Schedule of Assumptions Used in the Black-Scholes Option-Pricing Model

The weighted average Black-Scholes assumptions used to value stock options at the grant dates are as follows:

	Three Months Ended September 30,												Six Months Ended September 30,
	2022						2021						2022						2021
	Min			Max			Min			Max			Min			Max			Min			Max
Expected term (years)		6.0			6.0			6.0			6.0			6.0			6.8			6.0			6.0
Expected volatility		78	%		81	%		73	%		73	%		76	%		81	%		73	%		73	%
Risk-free interest rate		2.9	%		3.6	%		1.0	%		1.0	%		2.8	%		3.6	%		1.0	%		1.0	%
Expected dividend yield	—				—			—			—		—			—			—			—

Summary of Restricted Stock Awards Activity under the Equity Incentive Plan

The following table summarizes the RSU activity under the equity incentive plans and related information:

	Unvested RSUs			Weighted-Average Grant Date Fair Value Per Share
Balance as of March 31, 2022		10,676,378		$	9.70
Granted		19,473,231		$	3.45
Vested		(3,042,039	)	$	6.63
Cancelled/forfeited		(2,145,901	)	$	5.45
Balance as of September 30, 2022		24,961,669		$	5.57

Schedule of Share Based Compensation Costs

Total stock-based compensation expense, including stock-based compensation expense related to awards classified as liabilities, is included in costs and expenses as follows:

	Three Months Ended September 30,				Six Months Ended September 30,
	2022		2021		2022		2021
	(in thousands)				(in thousands)
Cost of revenue	$	2,413	$	945	$	5,740	$	1,743
Research and development		12,003		5,450		24,079		11,057
Sales and marketing		2,003		860		4,892		1,763
General and administrative		12,548		3,172		24,719		5,501
Total stock-based compensation expense	$	28,967	$	10,427	$	59,430	$	20,064