EARNINGS PER SHARE - Anti-dilutive securities (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities outstanding but excluded from computation of earnings per share	21,659	19,689	21,659	19,689
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities outstanding but excluded from computation of earnings per share	11,293	11,293	11,293	11,293
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities outstanding but excluded from computation of earnings per share	7,423	7,703	7,423	7,703
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities outstanding but excluded from computation of earnings per share	2,942	693	2,942	693