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, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic net income (loss) per share
Net income (loss)	$ 3,737	$ (14,169)	$ 4,544	$ (10,522)	$ (34,499)	$ 41,230	$ (5,887)	$ (3,791)
Weighted average common shares and warrants/share equivalents outstanding (in shares)	44,969			29,891			42,550	24,958
Basic net income (loss) per share (in dollars per share)	$ 0.08			$ (0.35)			$ (0.14)	$ (0.15)
Diluted net income (loss) per share
Net income (loss)	$ 3,737	$ (14,169)	$ 4,544	$ (10,522)	$ (34,499)	$ 41,230	$ (5,887)	$ (3,791)
Weighted average common shares and warrants/share equivalents outstanding (in shares)	44,969			29,891			42,550	24,958
Add: effect of dilutive stock options, awards, and equivalents (in shares)	86			0			0	0
Diluted net income (loss) per share (in dollars per share)	$ 0.08			$ (0.35)			$ (0.14)	$ (0.15)