INVENTORIES, NET (Schedule of Inventories) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INVENTORIES, NET [Abstract]
Work in Process	$ 3,607	$ 2,237
Parts and supplies	3,824	3,616
Finished goods	957	3,186
Inventories	8,388	9,039
Less - inventory reserve	(1,264)	(1,296)	$ (1,380)
Inventories, net	$ 7,124	$ 7,743