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Note 16 - Capital Stock (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Stock by Class [Table Text Block]
    Subordinate Voting Shares     Multiple Voting Shares     Total Common Shares  
    Number     Amount     Number     Amount     Number     Amount  
                                     
Balance, December 31, 2018    
37,887,442
    $
415,432
     
1,325,694
    $
373
     
39,213,136
    $
415,805
 
Balance, December 31, 2019    
38,519,517
     
441,780
     
1,325,694
     
373
     
39,845,211
     
442,153