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STOCKHOLDERS' EQUITY (Details 1) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Number Options    
Options outstanding, beginning 16,792,443us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Options Granted 919,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Options Exercised (11,250)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised (90,303)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Options Cancelled (114,584)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod  
Options outstanding, ending 17,586,109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Vested and exercisable 13,701,873us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber  
Weighted Average Exercise Price    
Options outstanding, beginning $ 1.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Granted $ 5.92us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice  
Exercised $ 0.64us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice  
Cancelled $ 2.82us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice  
Options outstanding, ending $ 2.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Vested and exercisable $ 1.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice  
Weighted Average Remaining Contractual Life    
Options outstanding, beginning 6 years 11 months 12 days  
Options outstanding, ending 6 years 6 months 10 days  
Vested and exercisable 5 years 10 months 20 days  
Aggregate Intrinsic Value    
Options outstanding, beginning $ 43,996,311us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue  
Options outstanding, ending 69,714,593us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue  
Vested and exercisable $ 62,312,047us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1