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Basis of Presentation (Tables)
6 Months Ended
Nov. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Inventory Inventory is comprised of the following: 
(In thousands)November 30, 2020May 31,
2020
Raw materials$14,291 $18,661 
Work in process24,706 29,497 
Finished goods495,131 360,740 
 $534,128 $408,898