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STOCKHOLDERS' EQUITY (Details 1) - Stock Options [Member] - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Options, Outstanding    
Options Outstanding beginning 20,872,824  
Options Granted 1,544,500  
Options Exercised (288,480)  
Options Expired (56,375)  
Options Outstanding ending 22,072,469 20,872,824
Vested and Exercisable ending 17,125,888  
Unvested ending 4,946,581  
Options, Weighted Average Exercise Price    
Options Outstanding beginning $ 4.93  
Granted 4.40  
Exercised 0.35  
Expired 5.77  
Options Outstanding ending 4.95 $ 4.93
Vested and Exercisable ending 4.79  
Unvested ending $ 5.48  
Options, Weighted Average Remaining Contractual Life    
Options Outstanding 5 years 9 months 18 days 5 years 11 months 8 days
Vested and Exercisable ending 4 years 11 months 8 days  
Unvested ending 8 years 9 months 14 days  
Options outstanding, Aggregate Intrinsic Value    
Options Outstanding beginning $ 12,239,876  
Options exercised 1,315,238  
Options Outstanding ending 3,945,665 $ 12,239,876
Vested and Exercisable ending $ 3,945,665