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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net Loss Per Share      
Potential dilutive securities excluded from diluted earnings (loss) per share calculation (in shares) 3,072,340us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 532,120us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 11,497us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Minimum      
Marketable securities      
Original maturity period of marketable securities 4 months    
Maximum      
Marketable securities      
Original maturity period of marketable securities 19 months