NET LOSS PER COMMON SHARE - Anti-dilutive securities (Details) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Preferred Stock
Antidilutive securities excluded from computation of loss per share
Potential dilutive securities excluded from the computation of diluted net loss per share attributable to common stockholders		3,093,898
Options
Antidilutive securities excluded from computation of loss per share
Potential dilutive securities excluded from the computation of diluted net loss per share attributable to common stockholders	3,767,571	1,035,466
Warrants Liability
Antidilutive securities excluded from computation of loss per share
Potential dilutive securities excluded from the computation of diluted net loss per share attributable to common stockholders	482,364	309,389