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STOCKHOLDERS' EQUITY (Details 2)
6 Months Ended
Jun. 30, 2019
$ / shares
shares
Equity [Abstract]  
Outstanding at December 31, 2018 | shares 6,095,692
Outstanding at June 30, 2019 | shares 6,637,199
Outstanding at June 30, 2019 | $ / shares $ 7.76
Granted | shares 1,268,080
Vested | shares (620,527)
Forfeited | shares (106,046)
Granted | $ / shares $ 12.95
Vested | $ / shares 8.91
Forfeited | $ / shares 7.82
Weighted Average Grant Date Fair Value, Outstanding at Begining Balance | $ / shares $ 8.07