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Note 8 - Fair Value Measurements (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Note 8 - Fair Value Measurements (Details) [Line Items]          
Financial and Nonfinancial Liabilities, Fair Value Disclosure $ 0   $ 0   $ 0
Provision for Loan and Lease Losses 0 $ 75,000 50,000 $ 190,000  
SEC Schedule III, Real Estate, Write-down or Reserve, Amount 0 0 0 0  
Impaired Loan [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Provision for Loan and Lease Losses $ 1,000 $ 16,000 $ 83,000 $ 37,000  
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Impaired Loan [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Fair Value Inputs Estimated Selling Costs     10.00%   10.00%
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Foreclosed Real Estate [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Fair Value Inputs, Discount Rate     28.00%   10.00%
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Impaired Loan [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Fair Value Inputs Estimated Selling Costs     20.00%   20.00%
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Foreclosed Real Estate [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Fair Value Inputs, Discount Rate     60.00%   60.00%
Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Foreclosed Real Estate [Member]          
Note 8 - Fair Value Measurements (Details) [Line Items]          
Fair Value Inputs, Discount Rate     32.00%   40.00%