Note 8 - Loans and Allowance for Loan Losses (Details) - Loans Disaggregated by Impairment Method (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Commercial:
Allowance for loan losses - balance	$ 8,366	$ 8,900	$ 8,925	$ 8,995	$ 9,431	$ 9,772
Allowance for loan losses - individually evaluated for impairment	1,913		2,022
Allowance for loan losses - collectively evaluated for impairment	6,090		6,234
Loans receivable - balance	536,627		501,752
Loans receivable - individually evaluated for impairment	21,679		27,617
Loans receivable - collectively evaluated for impairment	514,948		474,135
Commercial and Industrial [Member]
Commercial:
Allowance for loan losses - balance	2,276	2,407	2,044	2,064	1,994	2,505
Allowance for loan losses - individually evaluated for impairment	1,194		1,106
Allowance for loan losses - collectively evaluated for impairment	1,082		938
Loans receivable - balance	116,233		111,339
Loans receivable - individually evaluated for impairment	7,725		10,304
Loans receivable - collectively evaluated for impairment	108,508		101,035
Commercial Construction [Member]
Commercial:
Allowance for loan losses - balance	173	240	439	280	242	209
Allowance for loan losses - individually evaluated for impairment			121
Allowance for loan losses - collectively evaluated for impairment	173		318
Loans receivable - balance	18,439		15,929
Loans receivable - individually evaluated for impairment	1,184		1,351
Loans receivable - collectively evaluated for impairment	17,255		14,578
Commercial:Secured by Commercial Real Estate [Member]
Commercial:
Allowance for loan losses - balance	2,472	2,600	2,898	3,424	3,916	3,795
Allowance for loan losses - individually evaluated for impairment			9
Allowance for loan losses - collectively evaluated for impairment	2,472		2,889
Loans receivable - balance	196,796		190,602
Loans receivable - individually evaluated for impairment	10,081		12,288
Loans receivable - collectively evaluated for impairment	186,715		178,314
Commercial Secured By Residential Real Estate [Member]
Commercial:
Allowance for loan losses - balance	1,824	1,708	1,632	1,685	1,437	1,230
Allowance for loan losses - individually evaluated for impairment	676		639
Allowance for loan losses - collectively evaluated for impairment	1,148		993
Loans receivable - balance	50,593		47,672
Loans receivable - individually evaluated for impairment	2,161		2,833
Loans receivable - collectively evaluated for impairment	48,432		44,839
State And Political Subdivisions [Member]
Commercial:
Allowance for loan losses - balance	194	214	186	271	277	260
Allowance for loan losses - collectively evaluated for impairment	194		186
Loans receivable - balance	43,167		33,773
Loans receivable - collectively evaluated for impairment	43,167		33,773
Indirect Lease Financing [Member]
Commercial:
Allowance for loan losses - balance	76	92	103	103	156	168
Allowance for loan losses - individually evaluated for impairment			3
Allowance for loan losses - collectively evaluated for impairment	76		100
Loans receivable - balance	7,265		8,364
Loans receivable - individually evaluated for impairment	28		37
Loans receivable - collectively evaluated for impairment	7,237		8,327
Retail:1-4 Family Residential Mortgages [Member]
Commercial:
Allowance for loan losses - balance	320	372	303	249	289	324
Allowance for loan losses - individually evaluated for impairment	4		63
Allowance for loan losses - collectively evaluated for impairment	316		240
Loans receivable - balance	35,743		29,730
Loans receivable - individually evaluated for impairment	347		522
Loans receivable - collectively evaluated for impairment	35,396		29,208
Retail Home Equity Loans And Lines [Member]
Commercial:
Allowance for loan losses - balance	547	520	583	613		582
Allowance for loan losses - individually evaluated for impairment	39		70
Allowance for loan losses - collectively evaluated for impairment	508		513
Loans receivable - balance	64,132		59,977
Loans receivable - individually evaluated for impairment	153		266
Loans receivable - collectively evaluated for impairment	63,979		59,711
Retail:Consumer [Member]
Commercial:
Allowance for loan losses - balance	121	67	64	35	28	27
Allowance for loan losses - individually evaluated for impairment			11
Allowance for loan losses - collectively evaluated for impairment	121		53
Loans receivable - balance	4,259		3,116
Loans receivable - individually evaluated for impairment			16
Loans receivable - collectively evaluated for impairment	4,259		3,100
Unallocated [Member]
Commercial:
Allowance for loan losses - balance	363		669
Allowance for loan losses - individually evaluated for impairment
Allowance for loan losses - collectively evaluated for impairment
Loans receivable - balance
Loans receivable - individually evaluated for impairment
Loans receivable - collectively evaluated for impairment
Loans To Depository Institutions [Member]
Commercial:
Allowance for loan losses - balance		1	4	4	10	15
Allowance for loan losses - collectively evaluated for impairment			4
Loans receivable - balance			1,250
Loans receivable - collectively evaluated for impairment			$ 1,250