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Stock-Based Compensation (Details 1)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]    
Risk-free interest rate 1.00%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.10%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Expected term (in years) 3 years 4 months 17 days 1 year 3 months 15 days
Dividend yield 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
Expected volatility 75.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate 70.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate