EARNINGS PER SHARE - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase	4,218,250	3,460,750
Warrants to purchase	8,633,193	7,353,056
Series B Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Convertible preferred stock, common stock issuable upon conversion	3,883,449	3,658,905
Series B1 Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Convertible preferred stock, common stock issuable upon conversion	7,004,236	10,112,309
Series A Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares issued	419,859	419,859