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STOCKHOLDERS' EQUITY (Details 3) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Number Options      
Options Exercised     (75,423)
Stock Options [Member]      
Number Options      
Options outstanding, beginning 16,792,443    
Options Granted 4,685,000    
Options Exercised (613,284)    
Options Expired (102,500)    
Options Cancelled/Forfeited (36,334)    
Options outstanding, ending 20,725,325 16,792,443  
Vested and exercisable 15,461,986    
Unvested 5,263,339    
Weighted Average Exercise Price      
Options outstanding, beginning $ 1.88    
Granted 8.14    
Exercised 2.01    
Expired 2.68    
Cancelled 4.02    
Options outstanding, ending 3.28 $ 1.88  
Vested and exercisable 1.86    
Unvested $ 7.46    
Weighted Average Remaining Contractual Life      
Options outstanding, ending 6 years 6 months 6 years 10 months 25 days  
Vested and exercisable 5 years 6 months    
Unvested 9 years 4 months 24 days    
Aggregate Intrinsic Value      
Options outstanding, beginning $ 43,996,311    
Options outstanding, ending 146,864,184 $ 43,996,311  
Vested and exercisable 131,523,505    
Unvested $ 15,340,679