Note 11 - Income Taxes (Details) - Reconciliation of Tax Provision and Effective Tax Rate (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Tax Provision and Effective Tax Rate [Abstract]
Provision at statutory rate									$ 3,651	$ 4,007
Provision at statutory rate									34.00%	34.00%
Tax-exempt interest and dividend income									(1,249)	(1,341)
Tax-exempt interest and dividend income									(11.70%)	(11.40%)
Bank-owned life insurance									(109)	(113)
Bank-owned life insurance									(1.00%)	(1.00%)
Stock-based compensation expense									24	25
Stock-based compensation expense									0.20%	0.20%
Other									29	31
Other									0.30%	0.30%
Total provision	$ 519	$ 604	$ 490	$ 733	$ 550	$ 540	$ 769	$ 750	$ 2,346	$ 2,609
Total provision									21.80%	22.10%