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Note 8 - Stock Option Activity (Details) - $ / shares
 9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Outstanding at December 31, 2014 (in shares) 19,170 20,170
Outstanding at December 31, 2014 (in dollars per share) $ 32.63 $ 32.63
Granted (in shares)  
Exercised (in shares) 0  
Canceled (in shares) (1,000)  
Canceled (in dollars per share) $ 32.63  
Outstanding at September 30, 2015 (in dollars per share) $ 32.63  
Outstanding at September 30, 2015 1 year 211 days  
Exercisable at September 30, 2015 (in shares) 19,170  
Exercisable at September 30, 2015 1 year 211 days