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Note 4 - Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
   
2013
   
2012
 
Net income
  $ 1,586,321     $ 1,574,105  
Numerator for basic and diluted earnings per share
  $ 1,586,321     $ 1,574,105  
                 
Denominator for basic earnings per share – weighted-average shares
    10,162,442       10,156,442  
                 
Effect of dilutive securities:
               
Stock options
    31,777       16,508  
Warrants
    -       -  
Dilutive potential common shares
    31,777       16,508  
                 
Denominator for diluted earnings per share – weighted-average shares
    10,194,219       10,172,950  
                 
Basic earnings per share
  $ 0.16     $ 0.15  
Diluted earnings per share
  $ 0.16     $ 0.15