Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	$ 388,470	[1]	$ 398,004	[2]
Construction Lending (Member) | Real Estate Construction [Member] | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	796		228
Construction Lending (Member) | Real Estate Construction [Member] | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		0
Construction Lending (Member) | Real Estate Construction [Member] | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,929		2,929
Construction Lending (Member) | Real Estate Construction [Member] | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		0
Construction Lending (Member) | Real Estate Construction [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3,725	[1]	3,157	[2]
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,605		1,905
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		0
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		0
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		0
Consumer Lot Lending [Member] | Real Estate Construction [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,605	[1]	1,905	[2]
Commercial real estate lending [Member] | commercial, financial and agricultural (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	113,991		102,472
Commercial real estate lending [Member] | commercial, financial and agricultural (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,033		2,776
Commercial real estate lending [Member] | commercial, financial and agricultural (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	8,099		10,973
Commercial real estate lending [Member] | commercial, financial and agricultural (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3,550		3,426
Commercial real estate lending [Member] | commercial, financial and agricultural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	126,673	[1]	119,647	[2]
Land acquisition and development lending [Member] | commercial, financial and agricultural (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	17,217		19,422
Land acquisition and development lending [Member] | commercial, financial and agricultural (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,741		1,789
Land acquisition and development lending [Member] | commercial, financial and agricultural (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	438		7,692
Land acquisition and development lending [Member] | commercial, financial and agricultural (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	0		5,234
Land acquisition and development lending [Member] | commercial, financial and agricultural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	19,396	[1]	34,137	[2]
Builder Line Lending [Member] | commercial, financial and agricultural (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	10,166		13,469
Builder Line Lending [Member] | commercial, financial and agricultural (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,449		1,926
Builder Line Lending [Member] | commercial, financial and agricultural (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	585		538
Builder Line Lending [Member] | commercial, financial and agricultural (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	14		15
Builder Line Lending [Member] | commercial, financial and agricultural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	12,214	[1]	15,948	[2]
Commercial Business Lending [Member] | commercial, financial and agricultural (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	24,930		32,330
Commercial Business Lending [Member] | commercial, financial and agricultural (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	197		187
Commercial Business Lending [Member] | commercial, financial and agricultural (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	9,302		2,044
Commercial Business Lending [Member] | commercial, financial and agricultural (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	702		759
Commercial Business Lending [Member] | commercial, financial and agricultural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	35,131	[1]	35,320	[2]
Real Estate - Residential Mortgage (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	146,091		143,947
Real Estate - Residential Mortgage (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,441		1,374
Real Estate - Residential Mortgage (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,703		2,131
Real Estate - Residential Mortgage (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,136		1,805
Real Estate - Residential Mortgage (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	151,371	[1]	149,257	[2]
Equity Lines (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	31,071		31,199
Equity Lines (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,116		1,327
Equity Lines (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	706		767
Equity Lines (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	211		31
Equity Lines (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	33,104	[1]	33,324	[2]
consumer (Member) | Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	4,692		4,746
consumer (Member) | Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3		3
consumer (Member) | Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	368		369
consumer (Member) | Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	188		191
consumer (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	5,251	[1]	5,309	[2]
Pass [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	350,559		349,718
Special Mention [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	6,980		9,382
Substandard [Member]
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	24,130		27,443
Substandard Nonaccural (Member)
Note 4 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	$ 6,801		$ 11,461

[1] At June 30, 2013, the Corporation did not have any loans classified as Doubtful or Loss.

[2] At December 31, 2012, the Corporation did not have any loans classified as Doubtful or Loss.