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Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing $ 448 $ 359
Nonaccrual 3,776 3,626
Residential Real Estate Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 381 341
Nonaccrual 2,632 2,533
Commercial Real Estate Owner Occupied [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 0 0
Nonaccrual 1,085 675
Commercial Real Estate Nonowner Occupied [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 0 0
Nonaccrual 52 352
Automobile Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 8 11
Nonaccrual 4 4
Home Equity Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 58 0
Nonaccrual 0 62
Other Consumer Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 1 7
Nonaccrual $ 3 $ 0