EARNINGS PER SHARE - Narrative (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Options to purchase (in shares)	5,104,288	4,218,250
Warrants to purchase (in shares)	8,633,193	8,853,056
Series B Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Convertible preferred stock, common stock issuable upon conversion (in shares)	4,002,619	3,769,505
Series B1 Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Convertible preferred stock, common stock issuable upon conversion (in shares)	7,219,164	10,417,966
Series A Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Conversion of stock, shares issued (in shares)			419,859	419,859