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Note 10 - Income Per Common Share (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For three months ended September 30, 2019
   
For nine months ended September 30, 2019
 
   
Income Available to Common Shareholders
   
Average
Common
Shares
Outstanding
   
Per
Common
Share
   
Income Available to Common Shareholders
   
Average
Common
Shares
Outstanding
   
Per
Common
Share
 
Basic Income Per Common Share
  $
2,550,542
     
4,396,241
    $
0.58
    $
7,099,405
     
4,429,066
    $
1.60
 
Effect of Dilutive Securities
   
 
     
58,091
     
 
     
 
     
56,532
     
 
 
Diluted Income Per Common Share
  $
2,550,542
     
4,454,332
    $
0.57
    $
7,099,405
     
4,485,598
    $
1.58
 
   
For three months ended September 30, 2018
   
For nine months ended September 30, 2018
 
   
Income Available to Common Shareholders
   
Average
Common
Shares
Outstanding
   
Per
Common
Share
   
Income Available to Common Shareholders
   
Average
Common
Shares
Outstanding
   
Per
Common
Share
 
Basic Income Per Common Share
  $
3,934,242
     
4,418,196
    $
0.89
    $
4,947,003
     
4,406,830
    $
1.12
 
Effect of Dilutive Securities
   
 
     
72,389
     
 
     
 
     
72,058
     
 
 
Diluted Income Per Common Share
  $
3,934,242
     
4,490,585
    $
0.88
    $
4,947,003
     
4,478,888
    $
1.10