Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Allowance for loan losses:
Beginning balance	$ 6,468	$ 7,527	$ 6,905	$ 7,344
Provision for loan losses	833	1,183	675	3,023
Loans charged off	(350)	(974)	(1,530)	(3,697)
Recoveries	315	449	1,216	1,515
Total ending allowance balance	7,266	8,185	7,266	8,185
Residential Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	1,192	1,443	1,329	1,730
Provision for loan losses	173	257	318	552
Loans charged off	(94)	(61)	(551)	(739)
Recoveries	80	23	255	119
Total ending allowance balance	1,351	1,662	1,351	1,662
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	3,034	4,369	3,946	3,623
Provision for loan losses	313	394	(880)	2,290
Loans charged off	0	(54)	(2)	(1,212)
Recoveries	48	27	331	35
Total ending allowance balance	3,395	4,736	3,395	4,736
Commercial and Industrial [Member]
Allowance for loan losses:
Beginning balance	1,342	653	783	636
Provision for loan losses	291	359	823	(48)
Loans charged off	0	(429)	0	(499)
Recoveries	14	159	41	653
Total ending allowance balance	1,647	742	1,647	742
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	900	1,062	847	1,355
Provision for loan losses	56	173	414	229
Loans charged off	(256)	(430)	(977)	(1,247)
Recoveries	173	240	589	708
Total ending allowance balance	$ 873	$ 1,045	$ 873	$ 1,045