INVENTORIES, NET (Schedule of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INVENTORIES, NET [Abstract]
Work in Process	$ 2,474	$ 2,228
Parts and supplies	3,618	2,906
Finished goods	3,713	4,881
Inventories	9,805	10,015
Less - inventory reserve	(1,877)	(1,981)	(2,325)
Inventories, net	$ 7,928	$ 8,034