Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Restructured Loans that Defaulted during Reporting Period (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financing Receivable, Modifications [Line Items]
Number of Contracts	5	4	6	4
Principal Balance	$ 941	$ 891	$ 1,134	$ 891
Impairment Accrued	0	21	0	21
Consumer Real Estate [Member] | Residential closed end first liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	2	1	2
Principal Balance	74	123	74	123
Impairment Accrued	0	0	0	0
Consumer Real Estate [Member] | Residential closed end junior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	1	1	1
Principal Balance	60	93	60	93
Impairment Accrued	0	0	0	0
Commercial Real Estate Loans [Member] | Commercial real estate, owner occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	1	3	1
Principal Balance	670	675	863	675
Impairment Accrued	0	21	0	21
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	0	1	0
Principal Balance	137	0	137	0
Impairment Accrued	$ 0	$ 0	$ 0	$ 0