Note 7 - Loans and Allowance for Loan Losses (Details) - Aging Analysis of Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 983,919	$ 999,883
Real Estate Construction And Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	0	58
90 Days Or More Past Due	588	613
Total	588	671
Current	97,632	100,681
Total Loans	98,220	101,352
Real Estate Mortgage Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,972	1,225
90 Days Or More Past Due	2,390	2,502
Total	4,362	3,727
Current	362,260	367,855
Total Loans	366,622	371,582
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	690	3,548
90 Days Or More Past Due	11,225	7,978
Total	11,915	11,526
Current	402,515	406,621
Total Loans	414,430	418,147
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	54	71
90 Days Or More Past Due	196	53
Total	250	124
Current	47,649	47,302
Total Loans	47,899	47,426
States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	0	0
90 Days Or More Past Due	0	0
Total	0	0
Current	20,857	21,561
Total Loans	20,857	21,561
Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	8	0
90 Days Or More Past Due	70	22
Total	78	22
Current	492	861
Total Loans	570	883
Commercial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	17	56
90 Days Or More Past Due	0	0
Total	17	56
Current	21,249	23,784
Total Loans	21,266	23,840
Consumer Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	12	41
90 Days Or More Past Due	2	3
Total	14	44
Current	8,005	8,535
Total Loans	8,019	8,579
Consumer Unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	52	58
90 Days Or More Past Due	0	1
Total	52	59
Current	5,984	6,454
Total Loans	6,036	6,513
Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	2,805	5,057
90 Days Or More Past Due	14,471	11,172
Total	17,276	16,229
Current	966,643	983,654
Total Loans	$ 983,919	$ 999,883