Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Income Tax Disclosure [Abstract]
Income taxes at the statutory rates	21.00%	21.00%	21.00%
Federal tax credits	(1.00%)	(1.00%)	(1.30%)
State income taxes, net of federal tax benefit	3.40%	3.70%	4.00%
Impact of phased-in state law changes, net of federal benefit	(0.10%)	(1.00%)	(0.40%)
ASU 2016-09 benefit (share-based compensation)	(0.40%)	(0.10%)	(0.30%)
Nondeductible executive compensation	0.80%	0.90%	1.10%
Other	(0.40%)	0.00%	(0.10%)
Effective income tax rate	23.30%	23.50%	24.00%