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Basis of Presentation (Tables)
6 Months Ended
Nov. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Inventory Inventory is comprised of the following: 
(In thousands)
November 30,
2019
 
May 31,
2019
 
 
 
 
Raw materials
$
15,550

 
$
17,812

Work in process
27,148

 
28,820

Finished goods
305,606

 
287,957

 
$
348,304

 
$
334,589