Balance Sheet Components - Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Beginning balance	$ 2,700	$ 2,344	$ 1,247
Bad debt expense	2,722	2,980	5,095
Accounts written off	(2,013)	(2,624)	(3,631)
Ending balance	3,409	2,700	2,344
Amounts transferred to deferred revenue from accrued expenses and other liabilities upon entering into contracts with customers, net of revenue recognized during the period	$ 707	$ 0	$ 5,424