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Fair Value Measurement - Summary of Quantitative Information to Valuation Methodology (Details) (USD $)
0 Months Ended 3 Months Ended
Mar. 05, 2015
Feb. 18, 2015
Jan. 19, 2015
Mar. 31, 2015
Earnings Per Share [Abstract]        
Fair value of common stock $ 0.24us-gaap_FairValueAssumptionsExercisePrice $ 0.32us-gaap_FairValueAssumptionsExercisePrice $ 0.08us-gaap_FairValueAssumptionsExercisePrice $ 0.23us-gaap_FairValueAssumptionsExercisePrice
Dividend yield (per share) $ 0us-gaap_FairValueAssumptionsExpectedDividendPayments $ 0us-gaap_FairValueAssumptionsExpectedDividendPayments $ 0.00us-gaap_FairValueAssumptionsExpectedDividendPayments $ 0.00us-gaap_FairValueAssumptionsExpectedDividendPayments
Strike price $ 0.26us-gaap_SharePrice $ 0.26us-gaap_SharePrice $ 0.10us-gaap_SharePrice $ 0.10us-gaap_SharePrice
Volatility (annual) 124.56%us-gaap_FairValueAssumptionsExpectedVolatilityRate 123.36%us-gaap_FairValueAssumptionsExpectedVolatilityRate 108.44%us-gaap_FairValueAssumptionsExpectedVolatilityRate 107.90%us-gaap_FairValueAssumptionsExpectedVolatilityRate
Risk-free rate 0.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.23%us-gaap_FairValueAssumptionsRiskFreeInterestRate 1.29%us-gaap_FairValueAssumptionsRiskFreeInterestRate 1.37%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Expected life (years) 5 years 5 years 5 years 4 years 9 months 18 days