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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Major Classifications of Net Loans (USD $)
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross $ 443,729,000 $ 435,725,000    
Less Allowance for loan and lease losses 7,015,000 7,046,000 7,732,000 7,779,000
Net loans 436,714,000 428,679,000    
Commercial and Industrial [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross 56,855,000 54,498,000    
Less Allowance for loan and lease losses 867,000 614,000 1,230,000 1,732,000
Real Estate Construction [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross 25,241,000 25,601,000    
Less Allowance for loan and lease losses 488,000 576,000 1,048,000 1,123,000
Residential Real Estate Mortgage [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross 215,809,000 210,310,000    
Less Allowance for loan and lease losses 3,726,000 3,664,000 3,206,000 2,872,000
Commercial Real Estate Mortgage [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross 140,543,000 141,171,000    
Less Allowance for loan and lease losses 1,862,000 2,170,000 2,201,000 1,991,000
Consumer Installment [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financing Receivable Gross 5,281,000 4,145,000    
Less Allowance for loan and lease losses $ 72,000 $ 22,000 $ 47,000 $ 61,000