Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 474	$ 449	$ 226
Additions (Reductions) Charged to Cost and Expenses	103	485	420
Other	0	0	0
Deductions	(343)	(460)	(197)
Balance at End of Year	234	474	449
Reserve for Cash Discounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	1,487	1,753	1,973
Additions (Reductions) Charged to Cost and Expenses	16,700	18,397	21,540
Other	0	0	0
Deductions	(16,682)	(18,663)	(21,760)
Balance at End of Year	1,505	1,487	1,753
Reserve for Sales Returns and Allowances [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	7,160	9,290	9,539
Additions (Reductions) Charged to Cost and Expenses	21,413	25,040	26,043
Other	0	0	0
Deductions	(23,198)	(27,170)	(26,292)
Balance at End of Year	$ 5,375	$ 7,160	$ 9,290