Retirement Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Retirement Benefits [Abstract]
Employee contributions matched by employer (as a percent)	50.00%
Employee compensation eligible for employer match of employee contributions (as a percent)	4.00%
Employer contributions to defined contribution retirement plan	$ 8.9	$ 7.8	$ 6.8