Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Past Due and Nonaccrual Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	$ 4,105	[1]	$ 2,447	[1]
90 or more days past due	3,377	[1]	2,302	[1]
90 or more days past due and still accruing	272	[1]	207	[1]	163
Nonaccrual loans (including impaired nonaccruals)	9,225	[1]	9,287	[1]	6,078
Construction Other [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		[1]	28	[1]
90 or more days past due		[1]		[1]
90 or more days past due and still accruing		[1]		[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]
Equity Lines [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	80	[1]	25	[1]
90 or more days past due		[1]		[1]
90 or more days past due and still accruing		[1]		[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	1,117	[1]	719	[1]
90 or more days past due	131	[1]	185	[1]
90 or more days past due and still accruing	131	[1]	80	[1]
Nonaccrual loans (including impaired nonaccruals)	4	[1]	105	[1]
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	68	[1]	74	[1]
90 or more days past due		[1]	1	[1]
90 or more days past due and still accruing		[1]	1	[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	378	[1]
90 or more days past due		[1]
90 or more days past due and still accruing		[1]
Nonaccrual loans (including impaired nonaccruals)	14	[1]
Investor-owned Residential Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due			336	[1]
90 or more days past due			45	[1]
90 or more days past due and still accruing				[1]
Nonaccrual loans (including impaired nonaccruals)			59	[1]
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	844	[1]	850	[1]
90 or more days past due	868	[1]	868	[1]
90 or more days past due and still accruing		[1]		[1]
Nonaccrual loans (including impaired nonaccruals)	2,705	[1]	2,735	[1]
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	647	[1]		[1]
90 or more days past due	1,588	[1]	1,066	[1]
90 or more days past due and still accruing		[1]	102	[1]
Nonaccrual loans (including impaired nonaccruals)	2,841	[1]	2,573	[1]
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		[1]		[1]
90 or more days past due		[1]	70	[1]
90 or more days past due and still accruing		[1]		[1]
Nonaccrual loans (including impaired nonaccruals)	2,959	[1]	3,066	[1]
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	777	[1]	153	[1]
90 or more days past due	732	[1]	43	[1]
90 or more days past due and still accruing	83	[1]		[1]
Nonaccrual loans (including impaired nonaccruals)	702	[1]	749	[1]
Credit Card Receivable [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	3	[1]	3	[1]
90 or more days past due	7	[1]	4	[1]
90 or more days past due and still accruing	7	[1]	4	[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]
Automobile [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	172	[1]	205	[1]
90 or more days past due	51	[1]	20	[1]
90 or more days past due and still accruing	51	[1]	20	[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]
Other Consumer Loans [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	19	[1]	54	[1]
90 or more days past due		[1]		[1]
90 or more days past due and still accruing		[1]		[1]
Nonaccrual loans (including impaired nonaccruals)		[1]		[1]

[1] Only classes with past-due or nonaccrual loans are shown.