EARNINGS (LOSS) PER SHARE - Schedule of Basic and Diluted Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net (loss) income	$ 1,663	$ (7,668)	$ (19,910)	$ (42,794)	$ (13,603)	$ (3,712)	$ (25,915)	$ (60,109)
Denominator:
Weighted average number of common shares outstanding (in shares)	184,232,000			162,894,000			179,220,000	149,448,000
Effect of dilutive securities (in shares)	590,000			0			0	0
Weighted average common shares outstanding, diluted (in shares)	184,822,000			162,894,000			179,220,000	149,448,000
Earnings (loss) per common share:
Earnings (loss) per share, basic (in dollars per share)	$ 0.01			$ (0.26)			$ (0.14)	$ (0.40)
Earnings (loss) per share, diluted (in dollars per share)	$ 0.01			$ (0.26)			$ (0.14)	$ (0.40)
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded (in shares)				2,987,336			2,328,120	2,987,336
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded (in shares)				657,846			424,878	657,846
Restricted Stock Award
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded (in shares)				109,905			600,483	109,905