Note 5 - Loans (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Construction Land Development And Other Land Loans [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	0	0	1	1
Recorded Investment (in Dollars)	$ 0	$ 0	$ 56	$ 488
Non Farm Nonresidential [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	0	1	0	6
Recorded Investment (in Dollars)	0	256	0	1,801
Commercial Real Estate Loans [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans		1	1	7
Recorded Investment (in Dollars)		256	56	2,289
Single-Family Real Estate [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	0	1	1
Recorded Investment (in Dollars)	404	0	404	46
Commercial And Industrial [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	0	1	0
Recorded Investment (in Dollars)	127	0	127	0
Consumer [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	0	0	0	0
Recorded Investment (in Dollars)	0	0	0	0
Loans, Gross [Member]
Note 5 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	2	1	3	8
Recorded Investment (in Dollars)	$ 531	$ 256	$ 587	$ 2,335