Share Incentive Plan (Tables)

12 Months Ended

Apr. 30, 2022

Share-based Payment Arrangement [Abstract]

Summary of Information Related to Share Option Activity

A summary of information related to share option activity, excluding options early exercised, is as follows:

	Options Outstanding
	Outstanding Share Options	Weighted-Average Exercise Price	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value (in thousands)
Balances as of April 30, 2020	10,776,188	$0.67	7.53	$	15,592
Options granted	6,325,510	$2.70
Options exercised and vested	(2,468,792)	$0.56
Options canceled/ forfeited	(512,727)	$1.72
Balances as of April 30, 2021	14,120,179	$1.57	7.87	$	62,613
Options granted	701,500	$6.11
Options exercised and vested	(2,924,410)	$1.04
Options canceled/ forfeited	(536,524)	$3.18
Balances as of April 30, 2022	11,360,745	$1.94	7.12	$	103,412
Vested or expected to vest as of April 30, 2022	11,360,745	$1.94	7.12	$	103,412
Exercisable as of April 30, 2022	10,934,625	$1.94	7.12	$	99,497

Schedule of Weighted Average Assumptions used in Black-Scholes Model

The fair values of the employee share options granted in the years presented were estimated using the following weighted-average assumptions:

	Year Ended April 30,
	2022	2021	2020
Expected volatility	41.29% - 42.31%	40.12% - 42.84%	36.55% - 36.89%
Weighted-average expected term (in years)	5.96	5.97	5.91
Risk-free interest rate	0.69% - 1.23%	0.32% - 1.19%	1.68% - 1.75%
Dividend yield	—%	—%	—%
Weighted-average grant date fair value per share	$6.26	$1.86	$0.99

The following weighted-average assumptions were used for the year ended April 30, 2022 to calculate the fair value of ordinary share to be issued under the ESPP on the date of grant using the Black-Scholes option pricing model:

	Year Ended April 30,
	2022
Estimated fair value	4.56
Expected volatility	33.00%
Expected term (in years)	1.17
Risk-free interest rate	1.41%
Expected dividend yield	—%

Summary of RSU Activity

A summary of RSU activity is as follows:

	Number of shares	Weighted-Average Grant Date Fair Value	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value (in thousands)
Balances as of April 30, 2021	—	—	—	—
Granted	4,176,250	$10.25
Vested	(12,499)	$10.00
Canceled/ forfeited	(30,000)	$10.00
Balances as of April 30, 2022	4,133,751	$10.26	1.65	$	45,637
Expected to vest as of April 30, 2022	4,133,751	$10.26	1.65	$	45,637

Summary of Share-based Compensation Expense

The following table summarizes share-based compensation cost included in the consolidated statements of operations (in thousands).

	Year Ended April 30,
	2022		2021		2020
Cost of revenue	$	220	$	183	$	33
Research and development	5,021		7,737		584
Selling, general and administrative	3,947		5,986		630
	$	9,188	$	13,906	$	1,247