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Inventories (Tables)
3 Months Ended
Jul. 31, 2023
Inventory Disclosure [Abstract]  
Summary of Inventories Inventories consisted of the following (in thousands):
July 31, 2023April 30, 2023
Finished products$3,537 $3,412 
Work in process2,138 2,380 
Raw materials16,451 16,097 
Total$22,126 $21,889