Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	$ 2,529	$ 2,843
Nonaccrual loans	12,060	12,610
Residential Portfolio Segment [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	1,778	2,120
Nonaccrual loans	3,297	3,512
Residential Portfolio Segment [Member] | Home Equity Line of Credit1 [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	58	49
Nonaccrual loans	20	22
Residential Portfolio Segment [Member] | Senior Lien [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	1,706	1,989
Nonaccrual loans	3,227	3,440
Residential Portfolio Segment [Member] | Junior Lien [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	14	82
Nonaccrual loans	50	50
Commercial Portfolio Segment [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	715	693
Nonaccrual loans	8,740	9,074
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	630	653
Nonaccrual loans	5,714	5,804
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	0	5
Nonaccrual loans	257	379
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	85	35
Nonaccrual loans	1,815	1,915
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	0	0
Nonaccrual loans	933	951
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	0	0
Nonaccrual loans	21	25
Consumer Portfolio Segment [Member]
Note 7 - Loans (Details) - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing [Line Items]
Loans past due 90+ days and accruing	36	30
Nonaccrual loans	$ 23	$ 24