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Net Sales - Breakdown of Export Net Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Concentration Risk [Line Items]
Net sales	$ 523,845	$ 474,661	$ 535,833
Europe
Concentration Risk [Line Items]
Net sales	9,551	6,995	4,786
Asia
Concentration Risk [Line Items]
Net sales	4,922	8,174	9,346
Latin America
Concentration Risk [Line Items]
Net sales	1,925	1,498	5,314
All others international
Concentration Risk [Line Items]
Net sales	4,510	6,428	5,143
Total International
Concentration Risk [Line Items]
Net sales	$ 20,908	$ 23,095	$ 24,589

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