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Note 6 - Income Per Common Share (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For three months ended June 30, 2016
   
For six months ended June 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
  $ 1,256,152       4,366,507     $ 0.29     $ 2,532,757       4,363,375     $ 0.58  
Effect of Dilutive Securities
            53,977                       52,028          
Diluted Income Per Common Share
  $ 1,256,152       4,420,484     $ 0.28     $ 2,532,757       4,415,403     $ 0.57  
   
For three months ended June 30, 2015
   
For six months ended June 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
  $ 1,537,949       4,334,288     $ 0.35     $ 2,867,492       4,324,811     $ 0.66  
Effect of Dilutive Securities
            54,038                       56,405          
Diluted Income Per Common Share
  $ 1,537,949       4,388,326     $ 0.35     $ 2,867,492       4,381,216     $ 0.65