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Note 13 - Stock Based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 11, 2016
Jun. 11, 2016
May 10, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2009
Allocated Share-based Compensation Expense       $ 147 $ 137  
Dividends, Common Stock, Stock, Percentge 4.00% 4.00% 4.00% 4.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       0 0  
Employee Stock Option [Member]            
Allocated Share-based Compensation Expense       $ 75 $ 75  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized       $ 211    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       3 years    
Restricted Stock [Member]            
Allocated Share-based Compensation Expense       $ 72 $ 62  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized       $ 165    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           137,280
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 9.09 $ 7.60  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       11,149 11,404