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Stock-based compensation (Tables)

12 Months Ended

Mar. 31, 2021

Stock-based Compensation

Summary of stock option activity

				Weighted			Weighted Average
		Number of		Average			Contractual Term		Aggregate
		Shares		Exercise Price			(Years)		Intrinsic Value
Outstanding as of March 31, 2020		4,964,381		$	9.78		8.03		$	15,345
Granted		2,622,519			18.10		9.22
Exercised		(794,477)			7.23		6.41		$	24,859
Cancelled		(332,239)			14.00
Outstanding as of March 31, 2021		6,460,184			13.26		7.95		$	116,193
Options exercisable as of March 31, 2020		2,117,721		$	5.67		7.20		$	11,733
Options exercisable as of March 31, 2021		2,698,708		$	8.38		6.79		$	59,717

Schedule of stock-based compensation expense

The following table summarizes the classification of stock-based compensation expense in the consolidated statements of operations for the years ended March 31, 2021 and 2020 as follows:

		Twelve Months Ended
		March 31,
		2021			2020
Research and development		$	5,749		$	3,689
General and administrative			6,041			4,052
		$	11,790		$	7,741

The following table summarizes stock-based compensation expense by award type for the years ended March 31, 2021 and 2020 as follows:

		Twelve Months Ended
		March 31,
		2021			2020
Stock options		$	11,778		$	7,741
Restricted stock units			12			—
		$	11,790		$	7,741

Summary of changes in company's RSU

				Weighted
		Number of		Average
		Restricted		Grant Date
		Shares		Fair Value
Outstanding as of March 31, 2020		—		$	—
Granted		15,975			34.15
Vested		—			—
Cancelled		—			—
Outstanding as of March 31, 2021		15,975			34.15

Stock options

Stock-based Compensation

Schedule of assumptions used to determine the grant-date fair value of stock options granted

		Twelve Months Ended
		March 31,
		2021		2020
Risk-free interest rate		0.93	%	2.12	%
Expected term (in years)		6.3		6.0
Expected volatility		75.4	%	71.4	%
Expected dividend yield		0	%	0	%

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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