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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Oct. 31, 2022
Apr. 30, 2022
Inventory Disclosure [Abstract]    
Finished products $ 4,250 $ 4,555
Work in process 3,266 2,893
Raw materials 16,986 16,348
Total $ 24,502 $ 23,796