Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Loans past due 90 days and still accruing	$ 72	$ 73
Nonaccrual	9,452	9,549
Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Loans past due 90 days and still accruing	34
Nonaccrual	3,594	3,768
Commercial Real Estate Owner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Nonaccrual	781	1,484
Commercial Real Estate Nonowner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Nonaccrual	3,988	4,013
Construction [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Nonaccrual	769
Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Nonaccrual	91	95
Automobile Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Loans past due 90 days and still accruing	38	15
Nonaccrual	11	18
Home Equity Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Nonaccrual	149	103
Other Consumer Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing [Line Items]
Loans past due 90 days and still accruing		58
Nonaccrual	$ 69	$ 68