Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
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	$ 449	$ 226	$ 331
Additions (Reductions) Charged to Cost and Expenses	485	420	78
Other	0	0	0
Deductions	(460)	(197)	(183)
Balance at End of Year	474	449	226
Reserve for Cash Discounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	1,753	1,973	1,836
Additions (Reductions) Charged to Cost and Expenses	18,397	21,540	21,486
Other	0	0	0
Deductions	(18,663)	(21,760)	(21,349)
Balance at End of Year	1,487	1,753	1,973
Reserve for Sales Returns and Allowances [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	9,290	9,539	7,154
Additions (Reductions) Charged to Cost and Expenses	25,040	26,043	30,088
Other	0	0	0
Deductions	(27,170)	(26,292)	(27,703)
Balance at End of Year	$ 7,160	$ 9,290	$ 9,539