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Inventories
3 Months Ended
Jul. 31, 2023
Inventory, Net [Abstract]  
Inventories Inventories
 
The components of inventories were: 
 July 31,April 30,
(in thousands)20232023
Raw materials$70,403 $80,953 
Work-in-process45,639 49,064 
Finished goods51,497 60,682 
Total inventories$167,539 $190,699