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INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 6,093 $ 5,163
Finished goods 3,301 3,276
Gross inventories 9,394 8,439
Less: reserve for obsolescence (1,861) (1,913)
Net inventories $ 7,533 $ 6,526