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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Segment Reporting Information [Line Items]
Net sales	$ 54,564	$ 39,031	$ 104,687	$ 78,524
Intersegment revenues	0	0	0	0
Earnings (loss) before income taxes	456	(2,887)	116	(3,943)
Corporate / Eliminations
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Intersegment revenues	(3,985)	(741)	(6,402)	(1,481)
Earnings (loss) before income taxes	(1,891)	(1,370)	(3,423)	(2,881)
Domestic Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	37,991	29,934	75,459	59,597
Intersegment revenues	650	170	1,446	345
Earnings (loss) before income taxes	491	(2,095)	589	(2,304)
International Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	16,573	9,097	29,228	18,927
Intersegment revenues	3,335	571	4,956	1,136
Earnings (loss) before income taxes	$ 1,856	$ 578	$ 2,950	$ 1,242

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