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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net loss
Loss from continuing operations	$ (24,588)	$ (307)	$ (27,925)	$ (388)
Loss from discontinued operations, net of income taxes	(8)	(4)	(17)	(26)
Net loss	$ (24,596)	$ (311)	$ (27,942)	$ (414)
Per common share – basic
Loss from continuing operations (in dollars per share)	$ (3.80)	$ (0.05)	$ (4.33)	$ (0.06)
Loss from discontinued operations (dollars per share)	0.00	0.00	0.00	0.00
Net loss per common share – basic (dollars per share)	(3.80)	(0.05)	(4.33)	(0.06)
Per common share – diluted
Loss from continuing operations (dollars per share)	(3.80)	(0.05)	(4.33)	(0.06)
Loss from discontinued operations (dollars per share)	0.00	0.00	0.00	0.00
Net income (loss) per common share – diluted (dollars per share)	$ (3.80)	$ (0.05)	$ (4.33)	$ (0.06)
Weighted Average Common Shares Outstanding:
Basic (shares)	6,472	6,370	6,448	6,342
Diluted (shares)	6,472	6,370	6,448	6,342