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Note 8 - Computation of Income (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Restricted Stock [Member]        
Non-vested Restricted Stock Grants - Weighted Average Common Shares Outstanding (in shares) 34,622 30,699
Basic Income Per Share $ 814,000 $ 633,000 $ 885,000 $ 1,611,000
Basic Income Per Share (in shares) 3,958,718 3,872,298 3,957,343 3,872,074
Basic Income Per Share (in dollars per share) [1] $ 0.21 $ 0.16 $ 0.22 $ 0.42
Diluted Income Per Share (in shares) 3,958,718 3,906,920 3,957,343 3,902,773
Diluted Income Per Share (in dollars per share) [1] $ 0.21 $ 0.16 $ 0.22 $ 0.41
[1] All common stock data has been restated for a 1-for-10 reverse stock split which took effect on March 4, 2015.