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Note 5 - Earnings Per Share (Detail) - The following table sets forth the computation of basic and diluted earnings per share: (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Numerator:        
Net income (in Dollars) $ 280,770 $ 829,106 $ 3,394,514 $ 3,056,038
Numerator for basic and diluted earnings per share (in Dollars) $ 280,770 $ 829,106 $ 3,394,514 $ 3,056,038
Denominator:        
Weighted-average shares outstanding-basic 10,156,790 10,156,442 10,156,559 10,156,442
Effect of dilutive securities:        
Effect of dilutive securities 20,676 11,884 23,010 23,081
Denominator for diluted earnings per share-weighted-average shares 10,177,466 10,168,326 10,179,569 10,179,523
Basic earnings per share (in Dollars per share) $ 0.03 $ 0.08 $ 0.33 $ 0.30
Diluted earnings per share (in Dollars per share) $ 0.03 $ 0.08 $ 0.33 $ 0.30
Stock Options [Member]
        
Effect of dilutive securities:        
Effect of dilutive securities 20,676 11,884 23,010 23,081