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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventory [Abstract]    
Raw materials $ 14,313 $ 12,646
Work in process 10,610 9,631
Finished goods 18,583 16,487
Total inventory, gross 43,506 38,764
Inventory reserve 0 0
Total inventory, net 43,506 38,764
Inventory pledged as collateral for borrowings $ 0 $ 0