Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Restructurings that Occurred during Previous Periods (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	2	6	10
Pre-Modification Outstanding Principal Balance	$ 273	$ 231	$ 4,401	$ 1,816
Post-Modification Outstanding Principal Balance	354	231	4,576	1,844
Consumer Real Estate [Member] | Residential closed end first liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	1	2	5
Pre-Modification Outstanding Principal Balance	241	38	453	383
Post-Modification Outstanding Principal Balance	309	38	525	402
Consumer Real Estate [Member] | Residential closed end junior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			1	1
Pre-Modification Outstanding Principal Balance			262	143
Post-Modification Outstanding Principal Balance			267	147
Commercial Real Estate Loans [Member] | Commercial real estate, owner occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1	1	3
Pre-Modification Outstanding Principal Balance		193	154	890
Post-Modification Outstanding Principal Balance		193	239	895
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1		1	1
Pre-Modification Outstanding Principal Balance	32		32	400
Post-Modification Outstanding Principal Balance	$ 45		$ 45	$ 400