Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Current:
Federal	$ 5,539	$ 5,113	$ 983
State	2,243	1,232	401
Total current income tax expense	7,782	6,345	1,384
Deferred:
Federal	(4,362)	(3,678)	(685)
State	(1,531)	(429)	(137)
Total deferred income tax expense	(5,893)	(4,107)	(822)
Income tax expense	$ 1,889	$ 2,238	$ 562