Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans by Credit Quality Indicator - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	$ 611,597	$ 591,198
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	596,323	575,613
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	9,568	5,300
Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	5,706	10,285
Construction, 1-4 Family Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	10,532	14,222
Construction, 1-4 Family Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	3,768
Construction, 1-4 Family Residential [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		2,265
Construction Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	30,586	29,047
Construction Other [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		28
Equity Lines [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	15,715	15,861
Equity Lines [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	17	59
Equity Lines [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	78	60
Closed-end First Liens [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	78,380	78,806
Closed-end First Liens [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	464	1,566
Closed-end First Liens [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	830	1,412
Closed-end Junior Liens [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	4,653	4,258
Closed-end Junior Liens [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	55	21
Closed-end Junior Liens [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	63	95
Investor-owned Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	42,283	42,781
Investor-owned Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	611	688
Investor-owned Residential Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	868	614
Multifamily Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	75,085	73,611
Multifamily Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,345	1,397
Multifamily Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,815	850
Commercial Real Estate, Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	124,459	125,643
Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,278	202
Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,316	2,855
Commercial Real Estate, Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	95,149	90,821
Commercial Real Estate, Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,519	1,177
Commercial Real Estate, Other [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		582
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	37,217	31,247
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	357	97
Commercial and Industrial [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	684	1,390
States & Political Subdivisions [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	52,330	41,361
Credit Card Receivable [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	5,981	5,705
Automobile Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	12,134	11,505
Automobile Loan [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	123	93
Automobile Loan [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	39	128
Other Consumer Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	11,819	10,745
Other Consumer Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	31
Other Consumer Loans [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	13	6
Real Estate Construction Portfolio Segment[Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	44,886	45,562
Consumer Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	144,017	146,220
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	301,966	297,138
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	38,258	32,735
Public Sector and IDA Portfolio Segment[Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	52,330	41,361
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	$ 30,140	$ 28,182