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

Share capital - Disclosure of stock options outstanding (Details)

v3.19.3.a.u2
Share capital - Disclosure of stock options outstanding (Details)
shares in Thousands, $ / shares in Thousands
Dec. 31, 2019
yr
Dec. 31, 2019
$ / shares
Dec. 31, 2019
CAD ($)
Dec. 31, 2019
shares
Dec. 31, 2018
shares
Dec. 31, 2017
shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)   6,172   7,822 7,591 4,864
Weighted average remaining contractual life of outstanding share options (in years) | yr 7.86          
Options exercisable – End of year (in shares)       3,417 4,510  
Exercise price range one            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       268    
Weighted average remaining contractual life of outstanding share options (in years) | yr 1.91          
Options exercisable – End of year (in shares)       267    
Exercise price range two            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       1,107    
Weighted average remaining contractual life of outstanding share options (in years) | yr 4.82          
Options exercisable – End of year (in shares)       1,020    
Exercise price range three            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       2,325    
Weighted average remaining contractual life of outstanding share options (in years) | yr 7.85          
Options exercisable – End of year (in shares)       1,143    
Exercise price range four            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       715    
Weighted average remaining contractual life of outstanding share options (in years) | yr 9.27          
Options exercisable – End of year (in shares)       95    
Exercise price range five            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       3,301    
Weighted average remaining contractual life of outstanding share options (in years) | yr 9.07          
Options exercisable – End of year (in shares)       842    
Exercise price range six            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       76    
Weighted average remaining contractual life of outstanding share options (in years) | yr 7.32          
Options exercisable – End of year (in shares)       50    
Exercise price range seven            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Number of stock options outstanding (in shares)       30    
Weighted average remaining contractual life of outstanding share options (in years) | yr 9.96          
Options exercisable – End of year (in shares)       0    
Top of range | Exercise price range one            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     $ 3.96      
Top of range | Exercise price range two            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     4.73      
Top of range | Exercise price range three            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     6.92      
Top of range | Exercise price range four            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     7.85      
Top of range | Exercise price range five            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     8.97      
Top of range | Exercise price range six            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     9.45      
Top of range | Exercise price range seven            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     24.59      
Bottom of range | Exercise price range one            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     3.50      
Bottom of range | Exercise price range two            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     4.21      
Bottom of range | Exercise price range three            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     6.19      
Bottom of range | Exercise price range four            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     7.06      
Bottom of range | Exercise price range five            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     8.04      
Bottom of range | Exercise price range six            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     9.45      
Bottom of range | Exercise price range seven            
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]            
Exercise price of outstanding share options | $     $ 23.99