Derivative liability (Detail Textuals 2)
 12 Months Ended
Dec. 31, 2013
Warrants
  
Derivative [Line Items]  
Fair value assumptions dividend rate 0.00%
Fair value assumptions volatility rate 72.80%
Fair value assumptions risk free rate 0.09%
Fair value assumptions expected term 1 month
Fair value assumptions valuation model
simulated probability valuation model 
Dividend Warrants
  
Derivative [Line Items]  
Fair value assumptions dividend rate 0.00%
Fair value assumptions volatility rate 78.00%
Fair value assumptions risk free rate 1.30%
Fair value assumptions expected term 4 years
Fair value assumptions valuation model
simulated probability valuation model 
Investor Warrants
  
Derivative [Line Items]  
Fair value assumptions dividend rate 0.00%
Fair value assumptions volatility rate 78.00%
Fair value assumptions risk free rate 1.30%
Fair value assumptions expected term 4 years 3 months
Fair value assumptions valuation model
simulated probability valuation model 
Warrants Issued for Services
  
Derivative [Line Items]  
Fair value assumptions dividend rate 0.00%
Fair value assumptions volatility rate 88.00%
Fair value assumptions risk free rate 1.80%
Fair value assumptions expected term 4 years 9 months
Fair value assumptions valuation model
simulated probability valuation model