Financial risk management (Detail Textuals) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Interest Rate Risk [Member]
   
Concentration Risk [Line Items]    
Financial risk, interest rate fluctuation benchmark, percentage 10.00%  
Financial risk, short-term investments $ 70,961  
Credit Risk [Member]
   
Concentration Risk [Line Items]    
Financial risk, financial instrument maximum exposure 11,062 45,499
Foreign Exchange Risk [Member]
   
Concentration Risk [Line Items]    
Financial risk, accounts payable and accrued liabilities and loan payable 90,143  
Financial risk, interest rate fluctuation benchmark, percentage 10.00%  
Financial risk, financial instrument maximum exposure 9,014  
Liquidity Risk [Member]
   
Concentration Risk [Line Items]    
Financial risk, financial instrument maximum exposure $ 521,859 $ 1,389,744