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Inventories (Tables)
6 Months Ended
Nov. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventories Inventories are stated at lower of cost and net realizable value (using the first-in, first-out method). Inventories consisted of the following:
(in thousands)Nov 30, 2022May 31, 2022
Raw materials$33,732 $28,251 
Work in process8,201 7,186 
Finished goods21,244 15,955 
Inventories$63,177 $51,392