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Note 12 - Share-based Compensation - Summary of Restricted Shares (Details) - Restricted Stock [Member] - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Unvested at beginning of year (in shares) [1] 55,854 79,208 28,182
Unvested at beginning of year, weighted average grant date fair value (in dollars per share) [1] $ 12.83 $ 12.79 $ 12.60
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period [1] 58,084 12,700 73,558
Granted, weighted average grant date fair value (in dollars per share) [1] $ 15.25 $ 16.85 $ 13.21
Vested (in shares) [1] (8,161) (32,015) (22,532)
Vested, weighted average grant date fair value (in dollars per share) [1] $ 14.79 $ 13.14 $ 11.76
Forfeited (in shares) [1] (70,513) (4,039)  
Forfeited, weighted average grant date fair value (in dollars per share) [1] $ 14.67 $ 14.36  
Unvested at end of year (in shares) [1] 35,264 55,854 79,208
Unvested at end of year, weighted average grant date fair value (in dollars per share) [1] $ 12.84 $ 12.83 $ 12.79
[1] On March 4, 2015, the Company effected a 1-for-10 reverse stock split. The information included in the table above has been restated (as applicable) to give effect to the reverse stock split. Dilutive unvested shares of restricted stock are included in the calculation of diluted Earnings Per Share.