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INVENTORY - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 31,802 $ 25,920
Work-in-process 5,234 7,987
Finished goods 37,032 30,046
Inventory $ 74,068 $ 63,953