Note 8 - Loans & Allowance for Loan Losses (Details) - Allowance for Loan Losses Disaggregated by Impairment Method (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Commercial:
Allowance for loan losses	$ 9,431	$ 9,351	$ 9,772	$ 9,467	$ 9,456	$ 9,241
Allowance for loan losses, related to loans individually evaluated for impairment	2,181		2,701
Allowance for loan losses, related to loans collectively evaluated for impairment	6,832		6,414
Loans receivable balance	489,209		477,790
Loans receivable balance, related to loans individually evaluated for impairment	30,002		32,304
Loans receivable balance, related to loans collectively evaluated for impairment	459,207		445,486
Commercial:Commercial and Industrial [Member]
Commercial:
Allowance for loan losses	1,994	2,314	2,505	3,467	3,317	2,959
Allowance for loan losses, related to loans individually evaluated for impairment	652		1,309
Allowance for loan losses, related to loans collectively evaluated for impairment	1,342		1,196
Loans receivable balance	111,619		100,063
Loans receivable balance, related to loans individually evaluated for impairment	5,882		7,753
Loans receivable balance, related to loans collectively evaluated for impairment	105,737		92,310
Commercial:Construction [Member]
Commercial:
Allowance for loan losses	242	230	209	353	333	556
Allowance for loan losses, related to loans individually evaluated for impairment	0		0
Allowance for loan losses, related to loans collectively evaluated for impairment	242		209
Loans receivable balance	10,557		11,061
Loans receivable balance, related to loans individually evaluated for impairment	2,065		3,990
Loans receivable balance, related to loans collectively evaluated for impairment	8,492		7,071
Commercial:Secured by Commercial Real Estate [Member]
Commercial:
Allowance for loan losses	3,916	3,873	3,795	3,190	3,126	3,124
Allowance for loan losses, related to loans individually evaluated for impairment	850		619
Allowance for loan losses, related to loans collectively evaluated for impairment	3,066		3,176
Loans receivable balance	192,689		192,867
Loans receivable balance, related to loans individually evaluated for impairment	15,633		14,931
Loans receivable balance, related to loans collectively evaluated for impairment	177,056		177,936
Commercial Secured By Residential Real Estate [Member]
Commercial:
Allowance for loan losses	1,437	1,146	1,230	811	773	746
Allowance for loan losses, related to loans individually evaluated for impairment	534		543
Allowance for loan losses, related to loans collectively evaluated for impairment	903		687
Loans receivable balance	44,102		41,003
Loans receivable balance, related to loans individually evaluated for impairment	3,836		2,843
Loans receivable balance, related to loans collectively evaluated for impairment	40,266		38,160
State And Political Subdivisions [Member]
Commercial:
Allowance for loan losses	277	257	260	222	301	195
Allowance for loan losses, related to loans individually evaluated for impairment			0
Allowance for loan losses, related to loans collectively evaluated for impairment	277		260
Loans receivable balance	32,552		34,256
Loans receivable balance, related to loans individually evaluated for impairment	1,807		1,849
Loans receivable balance, related to loans collectively evaluated for impairment	30,745		32,407
Loans To Depository Institutions [Member]
Commercial:
Allowance for loan losses	10	10	15	20	20	20
Allowance for loan losses, related to loans individually evaluated for impairment	0		0
Allowance for loan losses, related to loans collectively evaluated for impairment	10		15
Loans receivable balance	2,250		3,250
Loans receivable balance, related to loans collectively evaluated for impairment	2,250		3,250
Indirect Lease Financing [Member]
Commercial:
Allowance for loan losses	156	179	168	268	238	312
Allowance for loan losses, related to loans individually evaluated for impairment	7		13
Allowance for loan losses, related to loans collectively evaluated for impairment	149		155
Loans receivable balance	8,703		9,685
Loans receivable balance, related to loans individually evaluated for impairment	72		98
Loans receivable balance, related to loans collectively evaluated for impairment	8,631		9,587
Retail:1-4 Family Residential Mortgages [Member]
Commercial:
Allowance for loan losses	289	300	324	300	303	249
Allowance for loan losses, related to loans individually evaluated for impairment	67		90
Allowance for loan losses, related to loans collectively evaluated for impairment	222		234
Loans receivable balance	27,774		28,733
Loans receivable balance, related to loans individually evaluated for impairment	440		456
Loans receivable balance, related to loans collectively evaluated for impairment	27,334		28,277
Retail Home Equity Loans And Lines [Member]
Commercial:
Allowance for loan losses	664	714	582	595	547	625
Allowance for loan losses, related to loans individually evaluated for impairment	71		127
Allowance for loan losses, related to loans collectively evaluated for impairment	593		455
Loans receivable balance	56,777		54,860
Loans receivable balance, related to loans individually evaluated for impairment	267		384
Loans receivable balance, related to loans collectively evaluated for impairment	56,510		54,476
Retail:Consumer [Member]
Commercial:
Allowance for loan losses	28	29	27	18	17	20
Allowance for loan losses, related to loans individually evaluated for impairment	0		0
Allowance for loan losses, related to loans collectively evaluated for impairment	28		27
Loans receivable balance	2,186		2,012
Loans receivable balance, related to loans collectively evaluated for impairment	2,186		2,012
Unallocated [Member]
Commercial:
Allowance for loan losses	$ 418	$ 299	$ 657	$ 223	$ 481	$ 435