Note 5 - Loans (Details) - Delinquencies by Class (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	$ 2,155	$ 3,202
Greater than 90 days past due and still accruing	731
Greater than 90 days past due and not accruing (nonaccrual	15,269	15,108
Total past due	18,155	18,310
Current	734,894	749,203
Loans, gross	753,049	767,513	741,355
Construction, Land Development and Other Land Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	338	82
Greater than 90 days past due and still accruing	731
Greater than 90 days past due and not accruing (nonaccrual	1,235	3,872
Total past due	2,304	3,954
Current	69,121	72,604
Loans, gross	71,425	76,558
Multi Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 days past due and not accruing (nonaccrual		181
Total past due		181
Current	9,294	10,236
Loans, gross	9,294	10,417
Non Farm Nonresidential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	210	1,199
Greater than 90 days past due and not accruing (nonaccrual	9,285	4,832
Total past due	9,495	6,031
Current	350,956	362,446
Loans, gross	360,451	368,477
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	548	1,281
Greater than 90 days past due and still accruing	731
Greater than 90 days past due and not accruing (nonaccrual	10,520	8,885
Total past due	11,799	10,166
Current	429,371	445,286
Loans, gross	441,170	455,452	449,619
Single-family Real Estate, Revolving, Open-end Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	429	148
Greater than 90 days past due and not accruing (nonaccrual	583	797
Total past due	1,012	945
Current	73,298	68,973
Loans, gross	74,310	69,918
Single Family Residential Closed End First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	534	1,091
Greater than 90 days past due and not accruing (nonaccrual	2,433	3,176
Total past due	2,967	4,267
Current	96,355	100,009
Loans, gross	99,322	104,276
Single Family Residential Closed End Junior Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	84	41
Greater than 90 days past due and not accruing (nonaccrual	105	129
Total past due	189	170
Current	3,358	3,761
Loans, gross	3,547	3,931
Single Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	1,047	1,280
Greater than 90 days past due and not accruing (nonaccrual	3,121	4,102
Total past due	4,168	5,382
Current	173,011	172,743
Loans, gross	177,179	178,125	170,735
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	301	306
Greater than 90 days past due and not accruing (nonaccrual	1,475	1,885
Total past due	1,776	2,191
Current	70,484	70,887
Loans, gross	72,260	73,078	63,993
Indirect Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	227	294
Greater than 90 days past due and not accruing (nonaccrual	129	210
Total past due	356	504
Current	40,146	38,220
Loans, gross	40,502	38,724
Consumer Other Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	32	41
Greater than 90 days past due and not accruing (nonaccrual	24	26
Total past due	56	67
Current	11,291	11,308
Loans, gross	11,347	11,375
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	259	335
Greater than 90 days past due and not accruing (nonaccrual	153	236
Total past due	412	571
Current	51,437	49,528
Loans, gross	51,849	50,099	48,480
Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,502	3,394
Loans, gross	3,502	3,394
Obligations Of States And Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	459	497
Loans, gross	459	497
Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,630	6,868
Loans, gross	6,630	6,868
All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,591	10,759
Loans, gross	$ 10,591	$ 10,759	$ 8,528