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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 13,114 $ 9,229
Work in process 3,629 3,295
Finished goods 9,737 10,919
Provision for excess and obsolete inventory (470) (251)
Total inventories $ 26,010 $ 23,192