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Note 6 - Income Per Common Share (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For three months ended September 30, 2016
   
For nine months ended September 30, 2016
 
   
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
  $ 1,541,907       4,370,700     $ 0.35     $ 4,074,664       4,365,835     $ 0.93  
Effect of Dilutive Securities
            56,853                       53,553          
Diluted Income Per Common Share
  $ 1,541,907       4,427,553     $ 0.35     $ 4,074,664       4,419,388     $ 0.92  
   
For three months ended September 30, 2015
   
For nine months ended September 30, 2015
 
   
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
  $ 1,418,635       4,338,803     $ 0.33     $ 4,286,128       4,329,526     $ 0.99  
Effect of Dilutive Securities
            55,216                       56,340          
Diluted Income Per Common Share
  $ 1,418,635       4,394,019     $ 0.32     $ 4,286,128       4,385,866     $ 0.98