Note 7 - Loans (Details) - Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Residential mortgage:
Beginning Balance	$ 7,118	$ 7,370	$ 6,857	$ 7,705
Charge-offs	(52)	(115)	(245)	(291)
Recoveries	66	35	337	58
Provision (Credit)	66	367	249	185
Ending Balance	7,198	7,657	7,198	7,657
Residential Mortgage Loans - First Liens [Member]
Residential mortgage:
Beginning Balance	2,786	2,953	2,619	3,026
Charge-offs	(13)	(50)	(65)	(188)
Recoveries	11	18	11	18
Provision (Credit)	87	(33)	306	32
Ending Balance	2,871	2,888	2,871	2,888
Residential Mortgage Loans - Junior Liens [Member]
Residential mortgage:
Beginning Balance	236	260	247	266
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	(7)	(6)	(18)	(12)
Ending Balance	229	254	229	254
Home Equity Line of Credit [Member]
Residential mortgage:
Beginning Balance	251	232	255	231
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	7	13	3	14
Ending Balance	258	245	258	245
1-4 Family Residential Construction [Member]
Residential mortgage:
Beginning Balance	145	62	96	79
Charge-offs	(11)	0	(11)	0
Recoveries	0	0	0	0
Provision (Credit)	45	18	94	1
Ending Balance	179	80	179	80
Total Residential Mortgage [Member]
Residential mortgage:
Beginning Balance	3,418	3,507	3,217	3,602
Charge-offs	(24)	(50)	(76)	(188)
Recoveries	11	18	11	18
Provision (Credit)	132	(8)	385	35
Ending Balance	3,537	3,467	3,537	3,467
Commercial Loans Secured by Real Estate [Member]
Residential mortgage:
Beginning Balance	1,906	1,920	1,930	2,004
Charge-offs	0	0	0	0
Recoveries	43	0	293	0
Provision (Credit)	(5)	56	(279)	(28)
Ending Balance	1,944	1,976	1,944	1,976
Commercial and Industrial [Member]
Residential mortgage:
Beginning Balance	597	762	581	946
Charge-offs	(2)	(35)	(110)	(35)
Recoveries	1	4	2	5
Provision (Credit)	32	(19)	155	(204)
Ending Balance	628	712	628	712
Political Subdivisions [Member]
Residential mortgage:
Beginning Balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	0	0	0	0
Ending Balance	0	0	0	0
Commercial Construction and Land [Member]
Residential mortgage:
Beginning Balance	368	325	234	267
Charge-offs	(4)	0	(4)	0
Recoveries	0	0	0	0
Provision (Credit)	(106)	281	28	339
Ending Balance	258	606	258	606
Loans Secured by Farmland [Member]
Residential mortgage:
Beginning Balance	127	121	129	126
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	(6)	(4)	(8)	(9)
Ending Balance	121	117	121	117
Multi-family (5 or more) Residential [Member]
Residential mortgage:
Beginning Balance	65	63	67	66
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	(1)	1	(3)	(2)
Ending Balance	64	64	64	64
Agricultural Loans [Member]
Residential mortgage:
Beginning Balance	26	27	27	27
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	2	2	1	2
Ending Balance	28	29	28	29
Other Commercial Loans [Member]
Residential mortgage:
Beginning Balance	2	3	3	5
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	3	2	2	0
Ending Balance	5	5	5	5
Total Commercial [Member]
Residential mortgage:
Beginning Balance	3,091	3,221	2,971	3,441
Charge-offs	(6)	(35)	(114)	(35)
Recoveries	44	4	295	5
Provision (Credit)	(81)	319	(104)	98
Ending Balance	3,048	3,509	3,048	3,509
Consumer [Member]
Residential mortgage:
Beginning Balance	211	206	228	228
Charge-offs	(22)	(30)	(55)	(68)
Recoveries	11	13	31	35
Provision (Credit)	15	56	11	50
Ending Balance	215	245	215	245
Unallocated [Member]
Residential mortgage:
Beginning Balance	398	436	441	434
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	0	0	(43)	2
Ending Balance	$ 398	$ 436	$ 398	$ 436