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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 49,839	$ 50,123
Intersegment revenues	0	0
Earnings (loss) before income taxes	3,412	(340)
Corporate / Eliminations
Segment Reporting Information [Line Items]
Net sales	0	0
Intersegment revenues	(712)	(2,417)
Earnings (loss) before income taxes	(1,004)	(1,532)
Domestic Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	35,420	37,468
Intersegment revenues	51	796
Earnings (loss) before income taxes	3,623	98
International Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	14,419	12,655
Intersegment revenues	661	1,621
Earnings (loss) before income taxes	$ 793	$ 1,094

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