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STOCKHOLDERS' EQUITY (Details) - Warrants [Member] - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Number of shares Warrants      
Warrants outstanding at December 31, 2016 12,060,071    
Warrants granted 125,000    
Warrants exercised (9,066,666)   (1,255,485)
Warrants expired (2,500)    
Warrants outstanding at December 31, 2017 3,115,905 12,060,071  
Vested and Exercisable at December 31, 2017 2,792,983    
Unvested at December 31, 2017 322,922    
Weighted Average Exercise Price      
Warrants outstanding at December 31, 2016 $ 2.08    
Warrants granted 6.83    
Warrants exercised 1.98    
Warrants expired 2.64    
Warrants outstanding at December 31, 2017 2.58 $ 2.08  
Vested and Exercisable at December 31, 2017 2.64    
Warrants Unvested at December 31, 2017 $ 2.57    
Weighted Average Remaining Contractual Life      
Warrants outstanding 1 year 9 months 18 days 1 year  
Warrants Vested and Exercisable 9 months 18 days    
Warrants Unvested 2 years    
Aggregate Intrinsic Value      
Warrants outstanding at December 31, 2016 $ 45,063,867    
Warrants exercised 48,535,969 $ 3,988,343 $ 7,282,404
Warrants outstanding at December 31, 2017 11,348,273 $ 45,063,867  
Vested and Exercisable at December 31, 2017 1,141,836    
Unvested at December 31, 2017 $ 10,206,436