Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Income Tax Disclosure [Abstract]
Income taxes at the statutory rates	21.00%	21.00%	21.00%
Federal tax credits	(1.00%)	(1.30%)	(1.80%)
State income taxes, net of federal tax benefit	3.70%	4.00%	3.80%
Impact of phased-in state law changes, net of federal benefit	(1.00%)	(0.40%)	(0.80%)
ASU 2016-09 benefit (share-based compensation)	(0.10%)	(0.30%)	(1.00%)
Nondeductible executive compensation	0.90%	1.10%	1.20%
Other	0.00%	(0.10%)	0.50%
Effective income tax rate	23.50%	24.00%	22.90%