Note 5 - Loans (Details) - Delinquencies by Class at September 30, 2013 (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	$ 3,078	$ 7,580
Greater than 90 days past due and still accruing	1,723
Greater than 90 days past due and not accruing (nonaccrual)	14,735	15,848
Total past due	19,536	23,428
Current	737,278	715,630
Total loans	756,814	739,058
Construction Land Development And Other Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	336
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	4,143
Total past due	4,479
Current	70,921
Total loans	75,400	66,123
Multi Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	245
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	181	0
Total past due	181	245
Current	10,514	11,414
Total loans	10,695	11,659
Non Farm Nonresidential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	1,342	4,574
Greater than 90 days past due and still accruing	1,723
Greater than 90 days past due and not accruing (nonaccrual)	4,623	3,732
Total past due	7,688	8,306
Current	361,275	372,348
Total loans	368,963	380,654
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	1,678	4,994
Greater than 90 days past due and still accruing	1,723
Greater than 90 days past due and not accruing (nonaccrual)	8,947	9,199
Total past due	12,348	14,193
Current	442,710	445,019
Total loans	455,058	459,212
Revolving Lines Secured By Single Family Residential Properties [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	173	245
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	1,019	816
Total past due	1,192	1,061
Current	64,696	58,690
Total loans	65,888	59,751
Single Family Residential Closed End First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	461	1,441
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	3,585	4,442
Total past due	4,046	5,883
Current	100,709	97,639
Total loans	104,755	103,522
Single Family Residential Closed End Junior Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	99
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	232	299
Total past due	232	398
Current	3,818	4,509
Total loans	4,050	4,907
Single Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	634	1,785
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	4,836	5,557
Total past due	5,470	7,342
Current	169,223	160,838
Total loans	174,693	168,180
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	373	395
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	760	826
Total past due	1,133	1,221
Current	65,964	50,440
Total loans	67,097	51,661
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	0
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	3	17
Total past due	3	17
Current	0	0
Total loans	3	17
Consumer Other Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	393	405
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	188	247
Total past due	581	652
Current	48,812	49,905
Total loans	49,393	50,557
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	393	405
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	191	264
Total past due	584	669
Current	48,812	49,905
Total loans	49,396	50,574
Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	0
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	0	0
Total past due	0	0
Current	3,195	3,171
Total loans	3,195	3,171
Obligations Of States And Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	0
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	0	0
Total past due	0	0
Current	515	739
Total loans	515	739
All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	1
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	1	2
Total past due	1	3
Current	6,859	5,518
Total loans	6,860	5,521
Other Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days past due and still accruing	0	1
Greater than 90 days past due and still accruing	0
Greater than 90 days past due and not accruing (nonaccrual)	1	2
Total past due	1	3
Current	10,569	9,428
Total loans	$ 10,570	$ 9,431