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Note 9 - Basic and Diluted Earnings Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended March 31,
  
   
2020
    
2019
  
                 
Numerator for basic and diluted earnings per common share:                
Net income for the period   $
2,834
     $
2,799
  
                 
Denominator for basic and diluted earnings per common share:                
Basic weighted average number of common shares outstanding    
10,612,230
      
10,634,842
  
Effect of outstanding stock options    
101,448
      
201,055
  
Diluted weighted average number of shares outstanding    
10,713,678
      
10,835,897
  
                 
Basic earnings per common share   $
0.27
     $
0.26
  
                 
Diluted earnings per common share   $
0.26
     $
0.26