Stockholders' deficiency - Unvested stock options (Details 5)
12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CAD
Dec. 31, 2013
Stock Options
USD ($)
Dec. 31, 2012
Stock Options
USD ($)
Share Based Compensation Arrangement By Share Based Payment Award Stock Options Unvested Number Of Shares [Roll Forward]        
Number of options unvested, beginning balance     444,500   
Number of options, granted 900,000 900,000 2,340,000 1,020,000
Number of options, Cancelled     (120,000)  
Number of options, vested     (985,129) (575,500)
Number of options unvested, ending balance     1,679,371 444,500
Share Based Compensation Arrangement By Share Based Payment Award Stock Options Unvested Weighted Average Exercise Price [Roll Forward]        
Weighted average exercise price unvested, beginning balance (in Dollars per share)     $ 0.47   
Weighted average exercise price unvested, granted (in Dollars per share) $ 0.47 0.50 $ 1.15 $ 0.47
Weighted average exercise price unvested, cancelled (in Dollars per share)     $ 0.47  
Weighted average exercise price unvested, vested (in Dollars per share)     $ 1.05 $ 0.47
Weighted average exercise price unvested, ending balance (in Dollars per share)     $ 1.08 $ 0.47
Share Based Compensation Arrangement By Share Based Payment Award Stock Options Unvested Weighted Average Grant Date Fair Value [Roll Forward]        
Weighted average grant date fair value, unvested, beginning balance (in Dollars per share)     $ 0.30   
Weighted average grant date fair value, unvested, granted (in Dollars per share)     $ 0.63 $ 0.30
Weighted average grant date fair value, unvested, cancelled (in Dollars per share)     $ 0.30  
Weighted average grant date fair value, unvested, vested (in Dollars per share)     $ 0.58 $ 0.30
Weighted average grant date fair value, unvested, ending balance (in Dollars per share)     $ 0.59 $ 0.30