Note 4 - Loans (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Construction Land Development And Other Land Loans [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	1	1	1
Recorded Investment (in Dollars)	$ 56	$ 488	$ 56	$ 488
Non Farm Nonresidential [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	0	2	0	5
Recorded Investment (in Dollars)	0	406	0	1,545
Land Loans [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	3	1	6
Recorded Investment (in Dollars)	56	894	56	2,033
Single-Family Real Estate [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	0	0	0	1
Recorded Investment (in Dollars)	0	0	0	46
Total Single Family [Member]
Note 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	3	1	7
Recorded Investment (in Dollars)	56	894	56	2,079
Other Loans Held For Sale [Member]
Note 4 - 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 4 - Loans (Details) - Troubled Debt Restructurings [Line Items]
Number of loans	1	3	1	7
Recorded Investment (in Dollars)	$ 56	$ 894	$ 56	$ 2,079