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Inventories (Tables)
6 Months Ended
Oct. 31, 2022
Inventory Disclosure [Abstract]  
Summary of Inventories Inventories consisted of the following (in thousands):
October 31, 2022April 30, 2022
Finished products$4,250 $4,555 
Work in process3,266 2,893 
Raw materials16,986 16,348 
Total$24,502 $23,796