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Note 3 - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
   
For the Three
   
For the Nine
 
   
Months Ended
   
Months Ended
 
   
September 30,
   
September 30,
 
   
2016
   
2015
   
2016
   
2015
 
Weighted-average common shares
outstanding
    2,633,752       2,253,584       2,445,821       2,248,468  
                                 
Average treasury stock shares
    (386,165 )     (189,530 )     (386,165 )     (189,530 )
                                 
Weighted-average common shares and
common stock equivalents used to
calculate basic earnings per share
    2,247,587       2,064,054       2,059,656       2,058,938  
                                 
Additional common stock equivalents
(stock options) used to calculate
diluted earnings per share
    8,643       8,585       8,876       9,254  
                                 
Weighted-average common shares and
common stock equivalents used
to calculate diluted earnings per share
    2,256,230       2,072,639       2,068,532       2,068,192