(LOSS) EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive potential common shares											$ 0
Numerator:
Net (loss) income	$ 17,839,000	$ 1,663,000	$ (7,668,000)	$ (19,910,000)	$ (15,811,000)	$ (42,794,000)	$ (13,603,000)	$ (3,712,000)	$ (8,076,000)	$ (75,920,000)	$ (6,115,000)
Denominator:
Weighted average number of common shares outstanding (in shares)									180,971,000	156,280,000	142,614,000
Loss per Common Share:
Loss per common share, basic and diluted (in dollars per share)									$ (0.04)	$ (0.49)	$ (0.04)
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)									2,285,784	2,328,120
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)									412,831	644,975
Restricted Stock Award
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)									549,650	231,562