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Share Based Payments - Disclosure Weighted Average Assumptions and Fair Value of Options (Details)
12 Months Ended
Dec. 31, 2018
CAD ($)
year
Dec. 31, 2017
CAD ($)
year
Dec. 31, 2016
CAD ($)
year
Disclosure Of Share-based Payment Arrangements [Abstract]      
Risk-free interest rate 2.02% 1.18% 0.82%
Expected hold period to exercise | year 3.0 3.0 3.0
Volatility in the price of the Company's shares 81.15% 90.73% 94.84%
Rate of forfeiture 3.67% 3.67% 3.67%
Dividend yield 0.00% 0.00% 0.00%
Weighted average fair value of options (cad per share) | $ $ 2.67 $ 2.65 $ 1.59