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Inventories (Tables)
12 Months Ended
Apr. 30, 2024
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following at April 30:
(in thousands)
20242023
Finished goods$3,042 $3,412 
Work-in-process1,931 2,380 
Materials and components15,706 16,097 
Total inventories$20,679 $21,889