LOSS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Common stock, par value (in USD per share)	$ 0.0001				$ 0.0001				$ 0.0001	$ 0.0001
Convertible preferred stock series, par value (in USD per share)	$ 0.0001								$ 0.0001
Loss from continuing operations									$ (51,592)	$ (63,303)	$ (36,172)
Income (loss) from discontinued operations, net of income taxes	$ 15	$ (71)	$ (15)	$ (30)	$ (287)	$ 66	$ (373)	$ (299)	(101)	(893)	(6,593)
Net loss	$ (15,363)	$ (8,174)	$ (15,139)	$ (13,017)	$ (1,962)	$ (12,992)	$ (29,523)	$ (19,719)	(51,693)	(64,196)	(42,765)
Accrued dividends on preferred stock									(11,210)	(10,077)	(9,084)
Loss attributable to common stockholders									$ (62,903)	$ (74,273)	$ (51,849)
Denominator - Basic and Diluted:
Weighted average number of common shares outstanding (in shares)									127,942	123,791	93,740
Loss Per Common Share:
Loss from continuing operations, basic and diluted (in USD per share)	$ (0.14)	$ (0.09)	$ (0.14)	$ (0.12)	$ (0.03)	$ (0.12)	$ (0.26)	$ (0.18)	$ (0.49)	$ (0.59)	$ (0.48)
Income (loss) from discontinued operations, basic and diluted (in USD per share)	0.00	0.00	0.00	0.00	(0.01)	0.00	0.00	0.00	0.00	(0.01)	(0.07)
Loss per common share, basic and diluted (in USD per share)	$ (0.14)	$ (0.09)	$ (0.14)	$ (0.12)	$ (0.04)	$ (0.12)	$ (0.26)	$ (0.18)	$ (0.49)	$ (0.60)	$ (0.55)

Face amount or stated value per share of common stock.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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