Income Taxes (Schedule Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Deferred tax assets:
Accounts receivable	$ 1,326	$ 1,737
Inventory	2,294	3,009
Product liability	1,044	1,395
Employee benefits	6,196	6,112
Operating leases liabilities	34,201	33,454
Section 174 research and development	19,102	9,542
Other	4,630	4,038
Gross deferred tax assets, before valuation allowance	75,164	65,374
Valuation allowance	(6,289)	(5,878)
Gross deferred tax assets, after valuation allowance	68,875	59,496
Deferred tax liabilities:
Pension benefits	241	235
Depreciation	23,181	25,059
Operating leases right-of-use assets	31,715	30,981
Interest rate swaps	155	2,448
Other	2,097	647
Gross deferred tax liabilities	57,389	59,370
Net deferred tax (asset) liability	(11,486)	(126)
State [Member]
Deferred tax assets:
Tax credit carryforwards	$ 6,371	$ 6,087