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Inventories (Tables)
3 Months Ended
Jul. 31, 2025
Inventory, Net [Abstract]  
Components of Inventories
The components of inventories were: 
 July 31,April 30,
(in thousands)20252025
Raw materials$79,826 $79,258 
Work-in-process43,482 47,979 
Finished goods58,431 50,874 
Total inventories$181,739 $178,111