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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2015
USD ($)
Sep. 30, 2014
Dec. 31, 2014
USD ($)
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) [Line Items]        
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment   $ 625,000   $ 1,596,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0   0  
Threshold for Loans Evaluated for Impairment [Member]        
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) [Line Items]        
Loans and Leases Receivable, Gross, Commercial   1,000,000    
Threshold for Loans Evaluated for Impairment [Member] | Outside Consultant [Member]        
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) [Line Items]        
Loans and Leases Receivable, Gross, Commercial   250,000    
Threshold for Loans Evaluated for Impairment [Member] | Criticized Relationships [Member]        
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) [Line Items]        
Financing Receivable, Gross   125,000    
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]        
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) [Line Items]        
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment   $ 267,000   $ 892,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts   1