Note 8 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Commercial:
Allowance for loan losses, beginning of period	$ 8,900	$ 9,431	$ 8,925	$ 9,772
Provision for (credit to) loan losses		150		250
Charge-offs	(578)	(634)	(794)	(1,177)
Recoveries	44	48	235	150
Allowance for loan losses, end of period	8,366	8,995	8,366	8,995
Retail Home Equity Loans And Lines [Member]
Commercial:
Allowance for loan losses, beginning of period		664
Provision for (credit to) loan losses		(14)
Charge-offs		(53)
Recoveries		16
Allowance for loan losses, end of period		613		613
Commercial and Industrial [Member]
Commercial:
Allowance for loan losses, beginning of period	2,407	1,994	2,044	2,505
Provision for (credit to) loan losses	(139)	131	190	(395)
Charge-offs		(68)	(17)	(68)
Recoveries	8	7	59	22
Allowance for loan losses, end of period	2,276	2,064	2,276	2,064
Commercial Construction [Member]
Commercial:
Allowance for loan losses, beginning of period	240	242	439	209
Provision for (credit to) loan losses	(67)	38	(266)	71
Allowance for loan losses, end of period	173	280	173	280
Commercial:Secured by Commercial Real Estate [Member]
Commercial:
Allowance for loan losses, beginning of period	2,600	3,916	2,898	3,795
Provision for (credit to) loan losses	(129)	(1)	(427)	119
Charge-offs		(491)		(491)
Recoveries	1		1	1
Allowance for loan losses, end of period	2,472	3,424	2,472	3,424
Commercial Secured By Residential Real Estate [Member]
Commercial:
Allowance for loan losses, beginning of period	1,708	1,437	1,632	1,230
Provision for (credit to) loan losses	555	238	623	736
Charge-offs	(452)		(453)	(336)
Recoveries	13	10	22	55
Allowance for loan losses, end of period	1,824	1,685	1,824	1,685
State And Political Subdivisions [Member]
Commercial:
Allowance for loan losses, beginning of period	214	277	186	260
Provision for (credit to) loan losses	(20)	(5)	8	12
Charge-offs		(1)		(1)
Allowance for loan losses, end of period	194	271	194	271
Loans To Depository Institutions [Member]
Commercial:
Allowance for loan losses, beginning of period	1	10	4	15
Provision for (credit to) loan losses	(1)	(6)	(4)	(11)
Allowance for loan losses, end of period		4		4
Indirect Lease Financing [Member]
Commercial:
Allowance for loan losses, beginning of period	92	156	103	168
Provision for (credit to) loan losses	(6)	(64)	(20)	(91)
Charge-offs	(14)		(20)	(1)
Recoveries	4	11	13	27
Allowance for loan losses, end of period	76	103	76	103
Retail:1-4 Family Residential Mortgages [Member]
Commercial:
Allowance for loan losses, beginning of period	372	289	303	324
Provision for (credit to) loan losses	39	(40)	108	(75)
Charge-offs	(92)		(92)
Recoveries	1		1
Allowance for loan losses, end of period	320	249	320	249
Retail Home Equity Loans And Lines [Member]
Commercial:
Allowance for loan losses, beginning of period	520		583	582
Provision for (credit to) loan losses	25		(15)	234
Charge-offs	(3)		(124)	(225)
Recoveries	5		103	22
Allowance for loan losses, end of period	547	613	547	613
Retail:Consumer [Member]
Commercial:
Allowance for loan losses, beginning of period	67	28	64	27
Provision for (credit to) loan losses	59	24	109	40
Charge-offs	(17)	(21)	(88)	(55)
Recoveries	12	4	36	23
Allowance for loan losses, end of period	121	35	121	35
Unallocated Financing Receivables [Member]
Commercial:
Allowance for loan losses, beginning of period	679	418	669	657
Provision for (credit to) loan losses	(316)	(151)	(306)	(390)
Charge-offs
Recoveries
Allowance for loan losses, end of period	$ 363	$ 267	$ 363	$ 267