NET LOSS PER COMMON SHARE - Anti-dilutive securities (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
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	4,704,888	4,529,675
Restricted Stock Units (RSUs)
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	469,485	206,529
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	125,618	153,473