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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Jan. 31, 2026
Apr. 30, 2025
Inventory Disclosure [Abstract]    
Finished products $ 5,086 $ 5,543
Work in process 6,376 3,784
Raw materials 21,445 23,522
Total $ 32,907 $ 32,849