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Inventories
6 Months Ended
Nov. 30, 2022
Inventory Disclosure [Abstract]  
Inventories INVENTORIESInventories 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 
The Company periodically reviews inventory for both obsolescence and loss of value. The Company makes assumptions about the future demand for and market value of the inventory. Based on these assumptions, the Company estimates the amount of obsolete, expiring and slow-moving inventory. The total inventory reserve at November 30, 2022 and May 31, 2022 was $3.9 million and $3.7 million, respectively.