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BASIS OF PRESENTATION AND SUMMARY OF ACCOUNTING POLICIES - Components of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Finished goods $ 201,453 $ 165,950
Work in process 145 61
Raw materials 8,227 7,416
Total $ 209,825 $ 173,427