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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 60,821	$ 40,633	$ 165,508	$ 119,157
Intersegment revenues	0	0	0	0
Earnings (loss) before income taxes	2,060	(887)	2,176	(4,830)
Corporate / Eliminations
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Intersegment revenues	(3,510)	(1,330)	(9,912)	(2,811)
Earnings (loss) before income taxes	(1,144)	(1,501)	(4,567)	(4,382)
Domestic Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	36,134	29,531	111,593	89,128
Intersegment revenues	52	194	1,498	539
Earnings (loss) before income taxes	417	(255)	1,006	(2,559)
International Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	24,687	11,102	53,915	30,029
Intersegment revenues	3,458	1,136	8,414	2,272
Earnings (loss) before income taxes	$ 2,787	$ 869	$ 5,737	$ 2,111

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