Annual report pursuant to Section 13 and 15(d)

Stock Based Awards (Details 1)

v2.4.1.9
Stock Based Awards (Details 1)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Risk-free interest rate   1.11%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Expected dividend yield    0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
Expected volatility 108.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate 108.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Expected term (in years) 6 years 29 days 6 years 29 days
Minimum [Member]    
Risk-free interest rate 0.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Expected volatility 79.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Expected term (in years) 1 year 1 month 28 days  
Maximum [Member]    
Risk-free interest rate 2.11%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Expected volatility 103.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Expected term (in years) 9 years 18 days  
2007 Equity Incentive Plan [Member] | Minimum [Member]    
Risk-free interest rate 1.08%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
2007 Equity Incentive Plan [Member] | Maximum [Member]    
Risk-free interest rate 2.51%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember