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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 6,126 $ 4,521
Finished goods and work-in-process 1,550 1,130
Gross inventories 7,676 5,651
Less: reserve for obsolescence (439) (439)
Net inventories $ 7,237 $ 5,212