NET INCOME (LOSS) PER SHARE - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Basic net income (loss) per share
Net (loss) income	$ (10,522)	$ (34,499)	$ 41,230	$ 3,331	$ (13,605)	$ (14,301)	$ (3,791)	$ (24,575)
Weighted average common shares and warrants outstanding (in shares)	119,564			72,747			99,832	67,332
Basic net (loss) income per share (in dollars per share)	$ (0.09)			$ 0.05			$ (0.04)	$ (0.36)
Diluted net income (loss) per share
Add: effect of dilutive stock options, awards, and equivalents (in shares)	0			0			0	0
Denominator for diluted income (loss) per share (in shares)	119,564			72,747			99,832	67,332
Diluted net loss per share (in dollars per share)	$ (0.09)			$ 0.05			$ (0.04)	$ (0.36)