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Note 5 - Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2012
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
 
 
Three Months Ended
   
Six Months Ended
 
   
June 30,
   
June 30,
 
   
2012
   
2011
   
2012
   
2011
 
Numerator:
                       
Net  income
  $ 1,539,638     $ 1,076,356     $ 3,113,744     $ 2,226,932  
Numerator for basic and diluted earnings per share
    1,539,638       1,076,356       3,113,744       2,226,932  
Denominator:
                               
Weighted-average shares outstanding-basic
    10,156,442       10,156,442       10,156,442       10,156,442  
                                 
Effect of dilutive securities:
                               
Stock options
    15,729       11,656       16,119       19,119  
Dilutive potential common shares
    15,729       11,656       16,119       19,119  
Denominator for diluted earnings per share-weighted-average shares
    10,172,171       10,168,098       10,172,561       10,175,561  
                                 
Basic earnings per share
  $ 0.15     $ 0.11     $ 0.30     $ 0.22  
Diluted earnings per share
  $ 0.15     $ 0.11     $ 0.30     $ 0.22