Note 10 - Federal Home Loan Bank Advances (Detail) - Fixed and Floating Rate FHLB Advances (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance	$ 101,265	$ 122,733
Weighted-average interest rate	0.75%	0.97%
Fixed Rate Term Federal Home Loan Bank Advances at 0.53% [Member]
Interest rate	0.53%
Maturity date	Dec. 31, 2008
Balance		10,000
Fixed Rate Term Federal Home Loan Bank Advances at 2.26% [Member]
Interest rate	2.26%
Maturity date	Dec. 31, 2008
Balance		10,000
Fixed Rate Term Federal Home Loan Bank Advances at 1.73% [Member]
Interest rate	1.73%
Maturity date	Dec. 31, 2008
Balance	355	1,197
Fixed Rate Term Federal Home Loan Bank Advances at 2.13% [Member]
Interest rate	2.13%
Maturity date	Dec. 31, 2008
Balance	910	1,536
Floating Rate Term Federal Home Loan Bank Advances at .73% [Member]
Interest rate	0.73%
Maturity date	Dec. 31, 2008
Balance	50,000	50,000
Floating Rate Term Federal Home Loan Bank Advances At .73% No. 2 [Member]
Interest rate	0.73%
Maturity date	Dec. 31, 2008
Balance	$ 50,000	$ 50,000