Note 8 - Loans & Allowance for Loan Losses (Details) - Loans Disaggregated by Impairment Method (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Commercial:
Allowance for loan losses	$ 8,995	$ 9,431	$ 9,772	$ 9,717	$ 9,467	$ 9,241
Allowance for loan losses related to loans individually evaluated for impairment	2,277		2,701
Allowance for loan losses related to loans collectively evaluated for impairment	6,451		6,414
Loans receivable	487,478		477,790
Loans receivable individually evaluated for impairment	28,564		32,304
Loans receivable collectively evaluated for impairment	458,914		445,486
Commercial:Commercial and Industrial [Member]
Commercial:
Allowance for loan losses	2,064	1,994	2,505	2,864	3,467	2,959
Allowance for loan losses related to loans individually evaluated for impairment	1,030		1,309
Allowance for loan losses related to loans collectively evaluated for impairment	1,034		1,196
Loans receivable	102,562		100,063
Loans receivable individually evaluated for impairment	5,974		7,753
Loans receivable collectively evaluated for impairment	96,588		92,310
Commercial:Construction [Member]
Commercial:
Allowance for loan losses	280	242	209	295	353	556
Allowance for loan losses related to loans collectively evaluated for impairment	280		209
Loans receivable	13,285		11,061
Loans receivable individually evaluated for impairment	1,537		3,990
Loans receivable collectively evaluated for impairment	11,748		7,071
Commercial:Secured by Commercial Real Estate [Member]
Commercial:
Allowance for loan losses	3,424	3,916	3,795	3,623	3,190	3,124
Allowance for loan losses related to loans individually evaluated for impairment	357		619
Allowance for loan losses related to loans collectively evaluated for impairment	3,067		3,176
Loans receivable	191,992		192,867
Loans receivable individually evaluated for impairment	14,866		14,931
Loans receivable collectively evaluated for impairment	177,126		177,936
Commercial Secured By Residential Real Estate [Member]
Commercial:
Allowance for loan losses	1,685	1,437	1,230	1,083	811	746
Allowance for loan losses related to loans individually evaluated for impairment	756		543
Allowance for loan losses related to loans collectively evaluated for impairment	929		687
Loans receivable	45,448		41,003
Loans receivable individually evaluated for impairment	3,528		2,843
Loans receivable collectively evaluated for impairment	41,920		38,160
State And Political Subdivisions [Member]
Commercial:
Allowance for loan losses	271	277	260	261	222	195
Allowance for loan losses related to loans collectively evaluated for impairment	271		260
Loans receivable	35,467		34,256
Loans receivable individually evaluated for impairment	1,697		1,849
Loans receivable collectively evaluated for impairment	33,770		32,407
Loans To Depository Institutions [Member]
Commercial:
Allowance for loan losses	4	10	15	15	20	20
Allowance for loan losses related to loans collectively evaluated for impairment	4		15
Loans receivable	1,250		3,250
Loans receivable collectively evaluated for impairment	1,250		3,250
Indirect Lease Financing [Member]
Commercial:
Allowance for loan losses	103	156	168	218	268	312
Allowance for loan losses related to loans individually evaluated for impairment	6		13
Allowance for loan losses related to loans collectively evaluated for impairment	97		155
Loans receivable	8,685		9,685
Loans receivable individually evaluated for impairment	51		98
Loans receivable collectively evaluated for impairment	8,634		9,587
Retail:1-4 Family Residential Mortgages [Member]
Commercial:
Allowance for loan losses	249	289	324	303	300	249
Allowance for loan losses related to loans individually evaluated for impairment	61		90
Allowance for loan losses related to loans collectively evaluated for impairment	188		234
Loans receivable	28,112		28,733
Loans receivable individually evaluated for impairment	636		456
Loans receivable collectively evaluated for impairment	27,476		28,277
Retail Home Equity Loans And Lines [Member]
Commercial:
Allowance for loan losses	613	664	582	500	595	625
Allowance for loan losses related to loans individually evaluated for impairment	67		127
Allowance for loan losses related to loans collectively evaluated for impairment	546		455
Loans receivable	58,140		54,860
Loans receivable individually evaluated for impairment	275		384
Loans receivable collectively evaluated for impairment	57,865		54,476
Retail:Consumer [Member]
Commercial:
Allowance for loan losses	35	28	27	27	18	20
Allowance for loan losses related to loans collectively evaluated for impairment	35		27
Loans receivable	2,537		2,012
Loans receivable collectively evaluated for impairment	2,537		2,012
Unallocated [Member]
Commercial:
Allowance for loan losses	$ 267	$ 418	$ 657	$ 528	$ 223	$ 435