Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Share capital - Disclosure of stock options outstanding (Details)

v3.19.1
Share capital - Disclosure of stock options outstanding (Details)
shares in Thousands, $ / shares in Thousands
Dec. 31, 2018
year
Dec. 31, 2018
$ / shares
Dec. 31, 2018
CAD ($)
Dec. 31, 2018
shares
Dec. 31, 2017
shares
Dec. 31, 2016
shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding   7,427   7,591 4,864 4,052
Weighted average remaining contractual life of outstanding share options (in years) | year 6.92          
Options exercisable – End of year (in shares)       4,510 2,834  
Exercise price range one [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding       828    
Weighted average remaining contractual life of outstanding share options (in years) | year 3.37          
Options exercisable – End of year (in shares)       764    
Exercise price range two [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding       3,075    
Weighted average remaining contractual life of outstanding share options (in years) | year 5.42          
Options exercisable – End of year (in shares)       2,446    
Exercise price range three [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding       2,805    
Weighted average remaining contractual life of outstanding share options (in years) | year 9.09          
Options exercisable – End of year (in shares)       882    
Exercise price range four [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding       883    
Weighted average remaining contractual life of outstanding share options (in years) | year 8.61          
Options exercisable – End of year (in shares)       418    
Canada, Dollars | Top of range | Exercise price range one [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     $ 4.00      
Canada, Dollars | Top of range | Exercise price range two [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     5.19      
Canada, Dollars | Top of range | Exercise price range three [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     6.92      
Canada, Dollars | Top of range | Exercise price range four [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     9.45      
Canada, Dollars | Bottom of range | Exercise price range one [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     3.39      
Canada, Dollars | Bottom of range | Exercise price range two [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     4.21      
Canada, Dollars | Bottom of range | Exercise price range three [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     6.40      
Canada, Dollars | Bottom of range | Exercise price range four [Member]            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     $ 7.06