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Inventories (Tables)
9 Months Ended
Jan. 31, 2023
Inventory Disclosure [Abstract]  
Summary of Inventories Inventories consisted of the following (in thousands):
January 31, 2023April 30, 2022
Finished products$3,800 $4,555 
Work in process2,725 2,893 
Raw materials14,887 16,348 
Total$21,412 $23,796