INVENTORIES, NET (Schedule of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
INVENTORIES, NET [Abstract]
Work in Process	$ 1,423	$ 2,155
Parts and supplies	4,906	4,178
Finished goods	5,551	7,144
Inventories	11,880	13,477
Less - inventory reserve	(2,261)	(2,325)
Inventories, net	$ 9,619	$ 11,152