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INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
INVENTORIES    
Parts and raw materials $ 24,556 $ 23,710
Work-in-process 5,076 2,404
Finished goods 5,296 3,730
Inventory, gross 34,928 29,844
Less reserves (4,849) (3,669)
Inventories, net $ 30,079 $ 26,175