Note 5 - Loans (Details) - Loans Modified (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Construction, Land Development and Other Land Loan [Member]
Note 5 - Loans (Details) - Loans Modified [Line Items]
Number of loans	1
Pre-modification outstanding recorded investment	$ 60
Post-modification outstanding recorded investment	60
Loans, Gross [Member]
Note 5 - Loans (Details) - Loans Modified [Line Items]
Number of loans	1
Pre-modification outstanding recorded investment	60
Post-modification outstanding recorded investment	60
Rate Concessions [Member]
Note 5 - Loans (Details) - Loans Modified [Line Items]
Number of loans	1
Pre-modification outstanding recorded investment	60
Post-modification outstanding recorded investment	$ 60