Note 4 - Allowance for Loan Losses (Detail) - Loans by Credit Quality Indicators (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loans	$ 277,259	$ 274,937
Construction Residential [Member] | Pass [Member]
Loans	5,882	5,036
Construction Residential [Member]
Loans	5,882	5,036
Land Acquistion, Development and Commercial [Member] | Pass [Member]
Loans	18,653	16,479
Land Acquistion, Development and Commercial [Member] | Substandard [Member]
Loans	1,550	1,963
Land Acquistion, Development and Commercial [Member] | Substandard Nonaccrual [Member]
Loans	1,731	1,756
Land Acquistion, Development and Commercial [Member]
Loans	21,934	20,198
Real Estate Residential [Member] | Pass [Member]
Loans	63,571	63,299
Real Estate Residential [Member] | Special Mention [Member]
Loans	5,551	5,581
Real Estate Residential [Member] | Substandard [Member]
Loans	227	229
Real Estate Residential [Member] | Substandard Nonaccrual [Member]
Loans	408	582
Real Estate Residential [Member]
Loans	69,757	69,691
Real Estate Commercial [Member] | Pass [Member]
Loans	101,868	103,010
Real Estate Commercial [Member] | Special Mention [Member]
Loans	2,459	2,479
Real Estate Commercial [Member] | Substandard [Member]
Loans	3,565	3,577
Real Estate Commercial [Member] | Substandard Nonaccrual [Member]
Loans		236
Real Estate Commercial [Member]
Loans	107,892	109,302
Commercial, Industrial and Agricultural [Member] | Pass [Member]
Loans	42,395	41,313
Commercial, Industrial and Agricultural [Member] | Special Mention [Member]
Loans	151	131
Commercial, Industrial and Agricultural [Member] | Substandard [Member]
Loans	1,060	938
Commercial, Industrial and Agricultural [Member] | Substandard Nonaccrual [Member]
Loans	157
Commercial, Industrial and Agricultural [Member]
Loans	43,763	42,382
Equity Lines [Member] | Pass [Member]
Loans	19,380	20,364
Equity Lines [Member] | Special Mention [Member]
Loans	25	25
Equity Lines [Member] | Substandard Nonaccrual [Member]
Loans	60	115
Equity Lines [Member]
Loans	19,465	20,504
Consumer [Member] | Pass [Member]
Loans	8,566	7,824
Consumer [Member]
Loans	8,566	7,824
Pass [Member]
Loans	260,315	257,325
Special Mention [Member]
Loans	8,186	8,216
Substandard [Member]
Loans	6,402	6,707
Substandard Nonaccrual [Member]
Loans	$ 2,356	$ 2,689