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Common Shares, Summary Of Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Capital Stock [Abstract]      
Number of options, beginning of period (in shares) 1,144,500    
Granted, Number of options (in shares) 820,000 0  
Number of options, Exercised (in shares) (30,000)    
Number of options, end of period (in shares) 1,934,500   1,144,500
Number of options, Exercisable (in shares) 1,134,912    
Weighted average exercise price per option, beginning of period (in dollars per share) $ 0.42    
Weighted average exercise price per option, Granted (in dollars per share) 0.75    
Weighted average exercise price per option, Exercised (in dollars per share) 0.36    
Weighted average exercise price per option, end of period (in dollars per share) 0.56   $ 0.42
Weighted average exercise price, Exercisable (in dollars per share) $ 0.51    
Weighted average remaining contractual term, Outstanding 2 years 4 months 10 days   1 year 1 month 24 days
Weighted average remaining contractual term, Exercisable 1 year 7 months 21 days    
Aggregate intrinsic value, Outstanding, beginning of period (in dollars) $ 346    
Aggregate intrinsic value, Outstanding, end of period (in dollars) 327   $ 346
Aggregate intrinsic value, Options, Exercisable $ 246