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Share-based Payments - Measurement of Fair Value of Share Options Granted (Details) - CAD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Share-Based Payment Arrangements [Abstract]    
Weighted average fair market value per option (C$) $ 0.70 $ 0.72
Risk free interest rate (%) 0.74% 0.54%
Expected volatility (based on actual historical volatility) (%) 48.67% 49.76%
Dividend rate 0.00% 0.00%
Expected forfeiture rate (non-executive employees) (%) 0.00% 0.00%
Suboptimal exercise factor 1.25 1.25