Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of May 1	$ 7,368	$ 5,333
Increases for tax positions related to the current year	4,001	2,035
Balance as of April 30	$ 11,369	$ 7,368