NET LOSS PER COMMON SHARE - EPS Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Weighted average common shares outstanding, basic and diluted (in shares)	50,929,575	42,943,828	46,289,103	42,109,618
Net loss	$ (22,549)	$ (36,490)	$ (47,809)	$ (116,168)
Net income (loss) per common share, basic and diluted (in dollars per share)	$ (0.44)	$ (0.85)	$ (1.03)	$ (2.76)