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Note 2 - Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Schedule of Weighted Average Number of Shares [Table Text Block]
   

2014

   

2013

   

2012

 

Weighted-average common shares outstanding

    2,231,165       2,206,392       2,101,490  
                         

Average treasury stock shares

    (189,530 )     (189,530 )     (189,530 )
                         

Weighted-average common shares and common stock equivalents used to calculate basic earnings per share

    2,041,635       2,016,862       1,911,960  
                         

Additional common stock equivalents used to calculate diluted earnings per share

    7,871       7,178       4,972  
                         

Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share

    2,049,506       2,024,040       1,916,932