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Note 8 - Loans and Allowance for Loan Losses (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Note 8 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Bank Overdrafts $ 214,000   $ 214,000   $ 142,000
Financing Receivable, Modifications, Recorded Investment $ 1,865,000 $ 0 $ 1,865,000 $ 0 5,587,000
Financing Receivable, Modifications, Number of Contracts 1   1 1  
Loans and Leases Receivable, Impaired, Commitment to Lend $ 1,939,000   $ 1,939,000   1,729,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down     $ 5,000 $ 522,000  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0 0 0 12  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment       $ 658,000  
Performing Financial Instruments [Member]          
Note 8 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 626,000   $ 626,000   1,897,000
Nonperforming Financial Instruments [Member]          
Note 8 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,239,000   1,239,000   $ 3,690,000
Consumer Portfolio Segment [Member]          
Note 8 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Mortgage Loans in Process of Foreclosure, Amount $ 45,000   $ 45,000    
Maximum [Member] | Residential Portfolio Segment [Member]          
Note 8 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Loan-to-value Ratio     80.00%