EARNINGS PER COMMON SHARE - Basic and Diluted Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net loss
Income (loss) from continuing operations	$ (7,389)	$ (581)	$ (7,777)	$ 1,148
Income (loss) from discontinued operations, net of income taxes	(8)	1	(34)	(42)
Net loss	$ (7,397)	$ (580)	$ (7,811)	$ 1,106
Per common share – basic
Income (loss) from continuing operations (dollars per share)	$ (1.15)	$ (0.09)	$ (1.22)	$ 0.18
Loss from discontinued operations (dollars per share)	0.00	0.00	(0.01)	(0.01)
Net income (loss) per common share – basic (dollars per share)	(1.15)	(0.09)	(1.23)	0.17
Per common share – diluted
Income (loss) from continuing operations (dollars per share)	(1.15)	(0.09)	(1.22)	0.18
Loss from discontinued operations (dollars per share)	0.00	0.00	(0.01)	(0.01)
Net income (loss) per common share – diluted (dollars per share)	$ (1.15)	$ (0.09)	$ (1.23)	$ 0.17
Weighted Average Common Shares Outstanding:
Basic (shares)	6,400	6,294	6,362	6,274
Diluted (shares)	6,400	6,294	6,362	6,465