Note 4 - Loans and Allowance for Credit Losses (Details) (USD $)	6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Restructured Loans [Member]	Dec. 31, 2012 Restructured Loans [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member]	Jun. 30, 2013 Three Loans [Member]	Jun. 30, 2013 Four Loans [Member]	Jun. 30, 2012 One Loan [Member]	Jun. 30, 2012 Two Loans (Member)	Jun. 30, 2012 Construction Loan [Member]	Jun. 30, 2012 Construction Loan [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 8,014,000	$ 6,678,000	$ 8,014,000	$ 6,678,000			$ 1,010,000	$ 3,019,000	$ 429,000	$ 1,817,000
Impaired Loans Restructured Nonaccrual Status	7,358,000	988,000
Troubled Debt Restructurings During Period	4						3		1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					3,954,000	3,954,000					3,068,000	3,068,000
Long-term Federal Home Loan Bank Advances	25,687,000	25,799,000
Restricted Pledged Loans	28,492,000	32,084,000
Loans Receivable Held-for-sale, Net	$ 0	$ 0