LOSS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Earnings Per Share [Abstract]
Common stock, par value (in dollars per share)	$ 0.0001		$ 0.0001		$ 0.0001
Numerator:
Loss from continuing operations, net of income taxes	$ (15,124)	$ (29,151)	$ (28,111)	$ (48,571)
Loss from discontinued operations, net of income taxes	(15)	(373)	(45)	(672)
Net loss	(15,139)	(29,524)	(28,156)	(49,243)
Dividends on preferred stock	(2,756)	(2,478)	(5,413)	(4,866)
Loss attributable to common stockholders	$ (17,895)	$ (32,002)	$ (33,569)	$ (54,109)
Denominator - Basic and Diluted:
Weighted average number of common shares outstanding, basic and diluted (in shares)	128,038	121,189	127,906	119,993
Loss per Common Share:
Loss from continuing operations, basic and diluted (in dollars per share)	$ (0.14)	$ (0.26)	$ (0.26)	$ (0.44)
Loss from discontinued operations, basic and diluted (in dollars per share)	0.00	0.00	0.00	(0.01)
Loss per common share, basic and diluted (in dollars per share)	$ (0.14)	$ (0.26)	$ (0.26)	$ (0.45)
Antidilutive securities excluded from computation of earnings per share (in shares)	13,600	18,300	11,800	18,400
Series A Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock series, par value (in dollars per share)	$ 0.0001		$ 0.0001		0.0001
Series C Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock series, par value (in dollars per share)	$ 0.0001		$ 0.0001		$ 0.0001