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	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 2,337		$ 2,625
Collectively evaluated for impairment	5,591		3,530
Total ending allowance balance	7,928	6,462	6,155	6,468	6,672	6,905
Loans:
Loans individually evaluated for impairment	18,274		14,696
Loans collectively evaluated for impairment	569,644		551,623
Total ending loans balance	587,918		566,319
Residential Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	230		213
Collectively evaluated for impairment	1,727		1,037
Total ending allowance balance	1,957	1,516	1,250	1,192	1,314	1,329
Loans:
Loans individually evaluated for impairment	1,421		1,438
Loans collectively evaluated for impairment	211,308		212,570
Total ending loans balance	212,729		214,008
Commercial Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	1,194		1,541
Collectively evaluated for impairment	1,977		1,266
Total ending allowance balance	3,171	2,740	2,807	3,034	3,744	3,946
Loans:
Loans individually evaluated for impairment	10,724		10,382
Loans collectively evaluated for impairment	182,762		175,284
Total ending loans balance	193,486		185,666
Commercial and Industrial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	907		864
Collectively evaluated for impairment	744		441
Total ending allowance balance	1,651	1,357	1,305	1,342	761	783
Loans:
Loans individually evaluated for impairment	5,910		2,658
Loans collectively evaluated for impairment	72,493		61,707
Total ending loans balance	78,403		64,365
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	6		7
Collectively evaluated for impairment	1,143		786
Total ending allowance balance	1,149	849	793	900	853	847
Loans:
Loans individually evaluated for impairment	219		218
Loans collectively evaluated for impairment	103,081		102,062
Total ending loans balance	$ 103,300		$ 102,280