Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Restructurings that Occurred during Reporting Peiod (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	2	5	4	8
Pre-Modification Outstanding Principal Balance	$ 474	$ 1,428	$ 4,128	$ 1,595
Post-Modification Outstanding Principal Balance	483	1,319	4,222	1,505
Impairment Accrued	10	197	10	244
Consumer Real Estate [Member] | Residential closed end first liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	2	1	4
Pre-Modification Outstanding Principal Balance	212	201	212	351
Post-Modification Outstanding Principal Balance	216	146	216	310
Impairment Accrued	3	0	3	47
Consumer Real Estate [Member] | Residential closed end junior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	1	1	1
Pre-Modification Outstanding Principal Balance	262	147	262	147
Post-Modification Outstanding Principal Balance	267	93	267	93
Impairment Accrued	7	0	7	0
Commercial Real Estate Loans [Member] | Commercial real estate, owner occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1	1	2
Pre-Modification Outstanding Principal Balance		680	154	697
Post-Modification Outstanding Principal Balance		680	239	702
Impairment Accrued		21	0	21
Commercial Real Estate Loans [Member] | Commercial real estate, other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			1
Pre-Modification Outstanding Principal Balance			3,500
Post-Modification Outstanding Principal Balance			3,500
Impairment Accrued			0
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1		1
Pre-Modification Outstanding Principal Balance		400		400
Post-Modification Outstanding Principal Balance		400		400
Impairment Accrued		$ 176		$ 176