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Note 17 - Stock-based Compensation Plan (Details) - USD ($)
12 Months Ended
Feb. 17, 2015
Dec. 31, 2015
Dec. 31, 2014
2009 Equity Incentive Plan [Member]      
Note 17 - Stock-based Compensation Plan (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)   223,000  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)   0  
Restricted Stock [Member]      
Note 17 - Stock-based Compensation Plan (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)   19,500  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)   $ 24.50  
Allocated Share-based Compensation Expense   $ 71,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   13,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 382,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   4 years 146 days  
Restricted Stock [Member] | Directors, Officers and Key Employees [Member]      
Note 17 - Stock-based Compensation Plan (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) 19,500    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 24.50    
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 478,000    
Maximum [Member] | Employee Stock Option [Member]      
Note 17 - Stock-based Compensation Plan (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value of Awards     $ 100,000