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Basis of Presentation - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Nov. 30, 2020
May 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Raw materials $ 14,291 $ 18,661
Work in process 24,706 29,497
Finished goods 495,131 360,740
Inventories, net 534,128 408,898
Reserves for obsolete inventory $ 52,300 $ 45,500