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STOCKHOLDERS' EQUITY (Details 1) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Number Options      
Options outstanding, beginning   16,792,443  
Options Granted   1,231,000 50,000
Options Exercised (366,617) (377,867) (728,844)
Options Cancelled   (120,376)  
Options outstanding, ending 17,525,200 17,525,200  
Vested and exercisable 13,746,672 13,746,672  
Weighted Average Exercise Price      
Options outstanding, beginning   $ 1.88  
Granted   6.38  
Exercised   1.30  
Cancelled   2.87  
Options outstanding, ending $ 2.20 2.20  
Vested and exercisable $ 1.56 $ 1.56  
Weighted Average Remaining Contractual Life      
Options outstanding, beginning   6 years 11 months 1 day  
Options outstanding, ending   6 years 4 months 6 days  
Vested and exercisable   5 years 8 months 16 days  
Aggregate Intrinsic Value      
Options outstanding, beginning   $ 43,996,311  
Options outstanding, ending $ 99,168,915 99,168,915  
Vested and exercisable $ 86,604,012 $ 86,604,012