EARNINGS (LOSS) PER SHARE (Computation of basic and diluted earnings (loss) per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings (loss) per share (EPS):
Earnings (loss) per share from continuing operations, basic and diluted	$ (0.07)	$ (0.06)	$ 0.38	$ (0.20)	$ (0.11)	$ (0.14)	$ (0.11)	$ (0.13)	$ 0.05	$ (0.48)	$ (0.93)
Earnings (loss) per share from discontinued operations, basic and diluted	0.00	0.00	0.03	(0.01)	0.19	(0.07)	(0.02)	(0.01)	0.02	0.08	(0.01)
Earnings Per Share, Basic and Diluted	$ (0.08)	$ (0.06)	$ 0.41	$ (0.21)	$ 0.08	$ (0.21)	$ (0.13)	$ (0.14)	$ 0.07	$ (0.40)	$ (0.94)
EPS numerator - basic and diluted:
Income (Loss) from Continuing Operations	$ (2,484)	$ (2,029)	$ 12,774	$ (6,654)	$ (3,539)	$ (4,570)	$ (3,565)	$ (4,112)	$ 1,607	$ (15,786)	$ (30,211)
Income (Loss) from Discontinued Operations, Net of Taxes	(142)	(55)	1,103	(184)	6,282	(2,449)	(809)	(432)	722	2,592	(184)
Net income (loss)	$ (2,626)	$ (2,084)	$ 13,877	$ (6,838)	$ 2,743	$ (7,019)	$ (4,374)	$ (4,544)	$ 2,329	$ (13,194)	$ (30,395)
EPS denominator (in thousands):
Weighted-average common stock outstanding - basic (in shares)	34,274	34,687	33,525	33,053					33,869	32,843	32,493
Common stock equivalents: stock options and other stock-based awards (a) (in shares)									215	0	0
Weighted-average number of common stock outstanding - diluted (in shares)	34,274	34,687	34,007	33,053					34,084	32,843	32,493