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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Significant Accounting Policies [Line Items]      
Accumulated deficit $ 109,763,015us-gaap_RetainedEarningsAccumulatedDeficit   $ 95,185,280us-gaap_RetainedEarningsAccumulatedDeficit
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 8,382,986us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 10,103,105us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount  
Cash, Cash Equivalents, and Short-term Investments, Total 105,225,592us-gaap_CashCashEquivalentsAndShortTermInvestments    
Cash Equivalents Maturity Period three months or less    
Restricted Cash and Investments $ 600,000us-gaap_RestrictedCashAndInvestments    
Minimum [Member]      
Significant Accounting Policies [Line Items]      
Period Anticipated Sufficient To Fund Operating Cash Flow 24 months