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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Net Loss Per Share    
Potential dilutive securities excluded from diluted earnings (loss) per share calculation (in shares) 4,122,123us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 5,596,655us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Depreciation and Amortization    
Estimated useful lives of assets 4 years  
Minimum    
Marketable securities    
Original maturity period of marketable securities 4 months  
Maximum    
Marketable securities    
Original maturity period of marketable securities 20 months