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STOCK-BASED COMPENSATION (Details 1)
 9 Months Ended
Sep. 30, 2017
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Balance at beginning | shares 5,636,000
Granted | shares 1,170,000
Exercised | shares (1,985,000)
Forfeiture and cancelled | shares (217,000)
Balance at end | shares 4,605,000
Exercisable at end | shares 3,066,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Balance at beginning | $ / shares $ 1.04
Granted | $ / shares 3.8
Exercised | $ / shares 0.83
Forfeiture and cancelled | $ / shares 1.77
Balance at end | $ / shares 1.8
Exercisable at end | $ / shares $ 1.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Intrinsic Value [Roll Forward]  
Balance at beginning | $ $ 14,847,000
Balance at end | $ $ 9,444,762
Share-based Compensation Arrangement by Share-based Payment Award, Options, Average Remaining Term [Roll Forward]  
Balance at beginning 5 years 22 days
Balance at end 5 years 3 months 4 days