Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 47,764	$ 50,436	$ 96,157	$ 100,275
Intersegment revenues	0	0	0	0
Earnings (loss) before income taxes	3,931	4,845	6,361	8,257
Corporate / Eliminations
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Intersegment revenues	(631)	(1,529)	(2,092)	(2,241)
Earnings (loss) before income taxes	(2,444)	(1,243)	(4,436)	(2,247)
Domestic Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	36,409	34,185	71,932	69,605
Intersegment revenues	157	374	270	425
Earnings (loss) before income taxes	5,765	4,287	9,400	7,910
International Operations | Operating Segments
Segment Reporting Information [Line Items]
Net sales	11,355	16,251	24,225	30,670
Intersegment revenues	474	1,155	1,822	1,816
Earnings (loss) before income taxes	$ 610	$ 1,801	$ 1,397	$ 2,594