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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]
   
For the Three Months Ended
 
   
March 31,
 
   
2020
   
2019
 
Net income (numerator)
  $
5,342,000
    $
1,218,000
 
                 
Shares (denominator):
               
Basic weighted average common shares outstanding
   
13,121,867
     
13,391,992
 
Add: dilutive effect of common stock options
   
542,843
     
77,505
 
                 
Diluted weighted average common shares outstanding
   
13,664,710
     
13,469,497
 
                 
Earnings per common share:
               
Basic
  $
0.41
    $
0.09
 
Diluted
  $
0.39
    $
0.09