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Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Estimated dividends    0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
Expected volatility 108.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate 108.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Risk-free interest rate   1.11%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Expected term 6 years 29 days 6 years 29 days
Minimum [Member]    
Expected volatility 79.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Risk-free interest rate 0.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Expected term 1 year 1 month 28 days  
Maximum [Member]    
Expected volatility 103.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Risk-free interest rate 2.11%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Expected term 9 years 18 days