Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment of Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 2,449	$ 2,625	$ 2,112
Collectively evaluated for impairment	4,013	3,530
Total ending allowance balance	6,462	6,155	6,672	6,905
Loans:
Loans individually evaluated for impairment	14,386	14,696
Loans collectively evaluated for impairment	559,941	551,623
Total ending loans balance	574,327	566,319
Residential Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	232	213
Collectively evaluated for impairment	1,284	1,037
Total ending allowance balance	1,516	1,250	1,314	1,329
Loans:
Loans individually evaluated for impairment	1,427	1,438
Loans collectively evaluated for impairment	212,397	212,570
Total ending loans balance	213,824	214,008
Commercial Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	1,361	1,541
Collectively evaluated for impairment	1,379	1,266
Total ending allowance balance	2,740	2,807	3,744	3,946
Loans:
Loans individually evaluated for impairment	10,147	10,382
Loans collectively evaluated for impairment	176,792	175,284
Total ending loans balance	186,939	185,666
Commercial and Industrial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	850	864
Collectively evaluated for impairment	507	441
Total ending allowance balance	1,357	1,305	761	783
Loans:
Loans individually evaluated for impairment	2,594	2,658
Loans collectively evaluated for impairment	70,331	61,707
Total ending loans balance	72,925	64,365
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	6	7
Collectively evaluated for impairment	843	786
Total ending allowance balance	849	793	853	847
Loans:
Loans individually evaluated for impairment	218	218
Loans collectively evaluated for impairment	100,421	102,062
Total ending loans balance	$ 100,639	$ 102,280