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Note 4 - Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended

   

Six Months Ended

 
   

June 30,

   

June 30,

 
   

2014

   

2013

   

2014

   

2013

 

Numerator:

                               

Net income

  $ 1,765,485     $ 1,629,353     $ 3,619,897     $ 3,215,674  

Numerator for basic and diluted earnings per share

    1,765,485       1,629,353       3,619,897       3,215,674  

Denominator:

                               

Weighted-average shares outstanding-basic

    10,198,733       10,167,649       10,198,733       10,165,060  
                                 

Effect of dilutive securities:

                               

Stock options

    39,376       48,886       39,067       40,379  

Restricted stock

    1,714       -       1,647       -  

Dilutive potential common shares

    41,090       48,886       40,714       40,379  

Denominator for diluted earnings per share-weighted-average shares

    10,239,823       10,216,535       10,239,447       10,205,439  
                                 

Basic earnings per share

  $ 0.17     $ 0.16     $ 0.35     $ 0.32  

Diluted earnings per share

  $ 0.17     $ 0.16     $ 0.35     $ 0.32