Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators (USD $)	Mar. 31, 2014		Dec. 31, 2013
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	$ 542,342,000	[1]	$ 542,660,000	[2]
Construction Lending [Member] | Real Estate Construction [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,228,000		1,068,000
Construction Lending [Member] | Real Estate Construction [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators			11,000
Construction Lending [Member] | Real Estate Construction [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,649,000		2,649,000
Construction Lending [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3,877,000	[1]	3,728,000	[2]
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,281,000		1,831,000
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	102,000		105,000
Consumer Lot Lending [Member] | Real Estate Construction [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	142,000		146,000
Consumer Lot Lending [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,525,000	[1]	2,082,000	[2]
Commercial Real Estate Lending [Member] | Commercial, Financial And Agricultural [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	168,774,000		152,017,000
Commercial Real Estate Lending [Member] | Commercial, Financial And Agricultural [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3,737,000		2,934,000
Commercial Real Estate Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	13,525,000		11,685,000
Commercial Real Estate Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,904,000		1,486,000
Commercial Real Estate Lending [Member] | Commercial, Financial And Agricultural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	187,940,000	[1]	168,122,000	[2]
Land Acquisition And Development Lending [Member] | Commercial, Financial And Agricultural [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	26,856,000		18,236,000
Land Acquisition And Development Lending [Member] | Commercial, Financial And Agricultural [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,386,000		1,601,000
Land Acquisition And Development Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	5,491,000		5,803,000
Land Acquisition And Development Lending [Member] | Commercial, Financial And Agricultural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	33,733,000	[1]	25,640,000	[2]
Builder Line Lending [Member] | Commercial, Financial And Agricultural [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	13,506,000		11,608,000
Builder Line Lending [Member] | Commercial, Financial And Agricultural [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,239,000		1,278,000
Builder Line Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	571,000		527,000
Builder Line Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	13,000		13,000
Builder Line Lending [Member] | Commercial, Financial And Agricultural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	15,329,000	[1]	13,426,000	[2]
Commercial Business Lending [Member] | Commercial, Financial And Agricultural [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	42,066,000		61,715,000
Commercial Business Lending [Member] | Commercial, Financial And Agricultural [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	1,583,000		2,758,000
Commercial Business Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	14,183,000		16,558,000
Commercial Business Lending [Member] | Commercial, Financial And Agricultural [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	374,000		374,000
Commercial Business Lending [Member] | Commercial, Financial And Agricultural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	58,206,000	[1]	81,405,000	[2]
Real Estate - Residential Mortgage [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	174,742,000		180,670,000
Real Estate - Residential Mortgage [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,378,000		2,209,000
Real Estate - Residential Mortgage [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	3,411,000		3,580,000
Real Estate - Residential Mortgage [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,040,000		1,996,000
Real Estate - Residential Mortgage [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	182,571,000	[1]	188,455,000	[2]
Equity Lines [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	47,705,000		48,603,000
Equity Lines [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	998,000		1,003,000
Equity Lines [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	975,000		898,000
Equity Lines [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	213,000		291,000
Equity Lines [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	49,891,000	[1]	50,795,000	[2]
Consumer [Member] | Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	7,912,000		8,616,000
Consumer [Member] | Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	2,000		2,000
Consumer [Member] | Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	127,000		158,000
Consumer [Member] | Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	229,000		231,000
Consumer [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	8,270,000	[1]	9,007,000	[2]
Pass [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	485,070,000		484,364,000
Special Mention [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	11,425,000		11,901,000
Substandard [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	41,074,000		42,004,000
Substandard Nonaccural [Member]
Note 5 - Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators [Line Items]
Financing Receivables by Credit Quality Indicators	$ 4,773,000		$ 4,391,000

[1] At March 31, 2014, the Corporation did not have any loans classified as Doubtful or Loss.

[2] At December 31, 2013, the Corporation did not have any loans classified as Doubtful or Loss.