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Note 20 - Net Earnings Per Common Share
12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Earnings Per Share [Text Block]
20.
Net earnings per common share
 
The following table reconciles the denominator used to calculate earnings per common share:
 
    2019     2018  
             
Shares issued and outstanding at beginning of period    
39,213,136
     
38,934,161
 
Weighted average number of shares: Issued during the period    
336,426
     
221,293
 
Weighted average number of shares used in computing basic earnings per share    
39,549,562
     
39,155,454
 
Assumed exercise of stock options acquired under the Treasury Stock Method    
431,456
     
639,161
 
Number of shares used in computing diluted earnings per share    
39,981,018
     
39,794,615