Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Past Due and Nonaccrual Loans - USD ($) $ in Thousands		Sep. 30, 2015		Dec. 31, 2014		Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing		$ 47	[1]	$ 207	[1]	$ 485
Nonaccruals (including impaired nonaccruals)		8,988	[1]	9,287	[1]	$ 7,726
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	2,652		2,447
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 5,114		$ 2,302
Construction Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]
Construction Other [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 27		$ 28
Construction Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]
Equity Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]
Equity Lines [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 63		$ 25
Equity Lines [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]
Closed-end First Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]	$ 46		$ 80
Nonaccruals (including impaired nonaccruals)	[1]	3		105
Closed-end First Liens [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	1,305		719
Closed-end First Liens [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 46		185
Closed-end Junior Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]			$ 1
Nonaccruals (including impaired nonaccruals)	[1]
Closed-end Junior Liens [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 64		$ 74
Closed-end Junior Liens [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]			$ 1
Investor-owned Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]	$ 12		$ 59
Investor-owned Residential Real Estate [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]			336
Investor-owned Residential Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]			$ 45
Multifamily Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]	$ 2,665		$ 2,735
Multifamily Real Estate [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	547		850
Multifamily Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 2,665		868
Commercial Real Estate, Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]			102
Nonaccruals (including impaired nonaccruals)	[1]	$ 2,542		$ 2,573
Commercial Real Estate, Owner Occupied [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	269
Commercial Real Estate, Owner Occupied [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 1,519		$ 1,066
Commercial Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]	$ 2,883		$ 3,066
Commercial Real Estate, Other [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 59
Commercial Real Estate, Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]			$ 70
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]	$ 883		$ 749
Commercial and Industrial [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	71		153
Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	883		43
Credit Card Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]	$ 1		$ 4
Nonaccruals (including impaired nonaccruals)	[1]
Credit Card Receivable [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 9		$ 3
Credit Card Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	1		4
Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]			$ 20
Nonaccruals (including impaired nonaccruals)	[1]
Automobile Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 175		$ 205
Automobile Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]			$ 20
Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or more days past due and still accruing	[1]
Nonaccruals (including impaired nonaccruals)	[1]
Other Consumer Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]	$ 63		$ 54
Other Consumer Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	[1]

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