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INVENTORIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 5,229 $ 5,163
Finished goods 3,346 3,276
Gross inventories 8,575 8,439
Less: reserve for obsolescence (1,866) (1,913)
Net inventories $ 6,709 $ 6,526