Equity Incentive Plans and Stock-Based Compensation (Tables)

9 Months Ended

Dec. 31, 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		4,866,230		$	3.50
Exercised		(2,592,856	)	$	1.57
Cancelled/forfeited/expired		(6,793,318	)	$	4.73
Balance as of December 31, 2022		69,089,621		$	4.20		6.3	$	10,109
Vested and exercisable as of December 31, 2022		46,306,985		$	4.11		5.2	$	7,165

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 December 31,												Nine Months Ended December 31,
	2022						2021						2022						2021
	Min			Max			Min			Max			Min			Max			Min			Max
Expected term (years)		6.0			6.0			3.3			6.1			6.0			6.8			3.3			6.1
Expected volatility		79	%		79	%		72	%		72	%		76	%		81	%		72	%		73	%
Risk-free interest rate		4.2	%		4.2	%		1.2	%		1.4	%		2.8	%		4.2	%		1.0	%		1.4	%
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		24,694,698		$	3.34
Vested		(4,673,354	)	$	6.75
Cancelled/forfeited		(2,952,268	)	$	5.60
Balance as of December 31, 2022		27,745,454		$	4.97

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 December 31,				Nine Months Ended December 31,
	2022		2021		2022		2021
	(in thousands)				(in thousands)
Cost of revenue	$	3,200	$	1,098	$	8,940	$	2,841
Research and development		15,188		7,697		39,267		18,754
Sales and marketing		2,444		1,178		7,336		2,941
General and administrative		13,506		7,436		38,225		12,937
Total stock-based compensation expense	$	34,338	$	17,409	$	93,768	$	37,473