Stock-Based Compensation - Summary of Option Activity (Detail) - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Share-based Payment Arrangement [Abstract]
Shares, Outstanding Beginning Balance	2,836,598
Shares, Options Exercised	(114,199)
Shares, Options Granted	1,007,000
Shares, Options Cancelled	(136,378)
Shares, Outstanding Ending Balance	3,593,021	2,836,598
Shares, Exercisable	2,067,684
Shares, Vested and expected to vest	3,593,021
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 13.22
Weighted Average Exercise Price, Options Exercised	8.49
Weighted Average Exercise Price, Options Granted	23.73
Weighted Average Exercise Price, Options Cancelled	18.86
Weighted Average Exercise Price, Outstanding Ending Balance	16.10	$ 13.22
Weighted Average Exercise Price, Exercisable	13.61
Weighted Average Exercise Price, Vested and expected to vest	$ 16.10
Weighted Average Remaining Contractual Life, Outstanding	7 years 3 months 3 days	7 years 7 months 6 days
Weighted Average Remaining Contractual Life, Exercisable	6 years 6 months 3 days
Weighted Average Remaining Contractual Life, Vested and expected to vest	7 years 3 months 3 days
Aggregate Intrinsic Value, Outstanding Beginning Balance	$ 33,514
Aggregate Intrinsic Value, Outstanding Ending Balance	6,430	$ 33,514
Aggregate Intrinsic Value, Exercisable	5,454
Aggregate Intrinsic Value, Vested and expected to vest	$ 6,430