Note 7 - Loans and Allowance for Loan Losses (Details) - Aging Analysis of Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 970,179	$ 999,883
Real Estate Construction And Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	568	58
90 Days Or More Past Due	317	613
Total	885	671
Current	96,884	100,681
Total Loans	97,769	101,352
Real Estate Mortgage Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	2,771	1,225
90 Days Or More Past Due	2,822	2,502
Total	5,593	3,727
Current	360,376	367,855
Total Loans	365,969	371,582
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	444	3,548
90 Days Or More Past Due	6,278	7,978
Total	6,722	11,526
Current	386,188	406,621
Total Loans	392,910	418,147
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	45	71
90 Days Or More Past Due	176	53
Total	221	124
Current	52,492	47,302
Total Loans	52,713	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	25,150	21,561
Total Loans	25,150	21,561
Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	171	0
90 Days Or More Past Due	0	22
Total	171	22
Current	222	861
Total Loans	393	883
Commercial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	25	56
90 Days Or More Past Due	0	0
Total	25	56
Current	20,744	23,784
Total Loans	20,769	23,840
Consumer Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	56	41
90 Days Or More Past Due	2	3
Total	58	44
Current	8,778	8,535
Total Loans	8,836	8,579
Consumer Unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	58	58
90 Days Or More Past Due	0	1
Total	58	59
Current	5,612	6,454
Total Loans	5,670	6,513
Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	4,138	5,057
90 Days Or More Past Due	9,595	11,172
Total	13,733	16,229
Current	956,446	983,654
Total Loans	$ 970,179	$ 999,883