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STOCK-BASED COMPENSATION (Details 1)
9 Months Ended
Sep. 30, 2019
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Balance at beginning | shares 4,840,000
Granted | shares 1,675,000
Exercised | shares (900,000)
Forfeiture and cancelled | shares (286,000)
Balance at end | shares 5,329,000
Exercisable at end | shares 2,305,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Balance at beginning | $ / shares $ 3.04
Granted | $ / shares 3.87
Exercised | $ / shares 0.97
Forfeiture and cancelled | $ / shares 2.59
Balance at end | $ / shares 3.66
Exercisable at end | $ / shares $ 2.76
Share-based Compensation Arrangement by Share-based Payment Award, Options, Intrinsic Value [Roll Forward]  
Balance at beginning | $ $ 5,338,000
Balance at end | $ $ 2,758,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Average Remaining Term [Roll Forward]  
Balance at beginning 5 years 18 days
Balance at end 6 years 1 month 6 days