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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 48,393	$ 49,839
Intersegment revenues	0	0
Earnings (loss) before income taxes	2,430	3,412
Corporate / Eliminations
Segment Reporting Information [Line Items]
Net sales	0	0
Intersegment revenues	(1,461)	(712)
Earnings (loss) before income taxes	(1,992)	(1,004)
Domestic Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	35,523	35,420
Intersegment revenues	113	51
Earnings (loss) before income taxes	3,635	3,623
International Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	12,870	14,419
Intersegment revenues	1,348	661
Earnings (loss) before income taxes	$ 787	$ 793

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