Note 4 - Allowance for Loan Losses (Detail) - Loans by Credit Quality Indicators, 2011 (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Loans	$ 274,937	$ 249,079
Construction Residential [Member] | Pass [Member]
Loans	5,036	3,695
Construction Residential [Member]
Loans	5,036	3,695
Land Acquistion, Development and Commercial [Member] | Pass [Member]
Loans	16,479	21,039
Land Acquistion, Development and Commercial [Member] | Substandard [Member]
Loans	1,963	2,240
Land Acquistion, Development and Commercial [Member] | Substandard Nonaccrual [Member]
Loans	1,756	433
Land Acquistion, Development and Commercial [Member] | Doubtful Nonaccrual [Member]
Loans		199
Land Acquistion, Development and Commercial [Member]
Loans	20,198	23,911
Real Estate Residential [Member] | Pass [Member]
Loans	63,299	56,767
Real Estate Residential [Member] | Special Mention [Member]
Loans	5,581	589
Real Estate Residential [Member] | Substandard [Member]
Loans	229
Real Estate Residential [Member] | Substandard Nonaccrual [Member]
Loans	582	714
Real Estate Residential [Member]
Loans	69,691	58,070
Real Estate Commercial [Member] | Pass [Member]
Loans	103,010	90,421
Real Estate Commercial [Member] | Special Mention [Member]
Loans	2,479	2,721
Real Estate Commercial [Member] | Substandard [Member]
Loans	3,577	9,170
Real Estate Commercial [Member] | Substandard Nonaccrual [Member]
Loans	236
Real Estate Commercial [Member]
Loans	109,302	102,312
Commercial, Industrial and Agricultural [Member] | Pass [Member]
Loans	41,313	35,136
Commercial, Industrial and Agricultural [Member] | Special Mention [Member]
Loans	131	178
Commercial, Industrial and Agricultural [Member] | Substandard [Member]
Loans	938	940
Commercial, Industrial and Agricultural [Member] | Substandard Nonaccrual [Member]
Loans		43
Commercial, Industrial and Agricultural [Member]
Loans	42,382	36,297
Equity Lines [Member] | Pass [Member]
Loans	20,364	18,375
Equity Lines [Member] | Special Mention [Member]
Loans	25
Equity Lines [Member] | Substandard Nonaccrual [Member]
Loans	115	643
Equity Lines [Member]
Loans	20,504	19,018
Consumer [Member] | Pass [Member]
Loans	7,824	5,776
Consumer [Member]
Loans	7,824	5,776
Pass [Member]
Loans	257,325	231,209
Special Mention [Member]
Loans	8,216	3,488
Substandard [Member]
Loans	6,707	12,350
Substandard Nonaccrual [Member]
Loans	2,689	1,833
Doubtful Nonaccrual [Member]
Loans		$ 199