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INVENTORY - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 25,920 $ 31,203
Work-in-process 7,987 781
Finished goods 30,046 38,016
Inventory $ 63,953 $ 70,000