STOCK-BASED COMPENSATION (Details 2)	Dec. 31, 2018 shares
Authorized Future Grant Under Stock Option Plans [Member]
Common stock reserved for future issuance	730,677
Convertible Preferred Stock [Member]
Common stock reserved for future issuance	42,626,029
Stock options outstanding
Common stock reserved for future issuance	7,227,248
Warrants outstanding
Common stock reserved for future issuance	1,813,856