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INVENTORIES (Schedule of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials, parts and supplies $ 7,367 $ 6,461
Work in process 10,300 6,541
Finished products 11,186 8,467
Inventory, Net $ 28,853 $ 21,469