Income Taxes - Schedule of Reconciliation of Statutory Federal Income Tax Rate to Effective Consolidated Tax Rate (Detail)	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
State tax, net of federal effect	2.80%	2.80%	2.80%
Foreign tax rates differential	4.70%	4.00%	4.00%
Non-deductible officer's compensation	1.60%	1.90%	1.00%
Change in valuation allowance	(0.50%)	(5.80%)	0.30%
Change in uncertain tax positions	(1.30%)	1.10%	0.10%
Foreign-derived intangible income deduction	(1.00%)	(1.20%)	(1.00%)
Repatriation of earnings of foreign subsidiaries	1.10%	1.40%	1.20%
R&D tax credit	(0.70%)	(1.50%)	(0.60%)
Other	(0.50%)	(1.20%)	(0.80%)
Effective income tax rate	27.20%	22.50%	28.00%