Note 7 - Loans (Details) - Aggregate Credit Quality Classification of Outstanding Loans by Risk Rating (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	$ 654,970	$ 683,910
Residential Mortgage Loans - First Liens [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	289,357	295,929
Residential Mortgage Loans - First Liens [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	2,440	3,633
Residential Mortgage Loans - First Liens [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	12,821	11,872
Residential Mortgage Loans - First Liens [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	188	193
Residential Mortgage Loans - First Liens [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	304,806	311,627
Residential Mortgage Loans - Junior Liens [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	23,608	25,394
Residential Mortgage Loans - Junior Liens [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	406	420
Residential Mortgage Loans - Junior Liens [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	783	934
Residential Mortgage Loans - Junior Liens [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Mortgage Loans - Junior Liens [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	24,797	26,748
Home Equity Line of Credit [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	32,623	32,374
Home Equity Line of Credit [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	96	130
Home Equity Line of Credit [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	357	513
Home Equity Line of Credit [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Home Equity Line of Credit [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	33,076	33,017
1-4 Family Residential Construction [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	14,823	12,759
1-4 Family Residential Construction [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
1-4 Family Residential Construction [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	72	83
1-4 Family Residential Construction [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
1-4 Family Residential Construction [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	14,895	12,842
Total Residential Mortgage [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	360,411	366,456
Total Residential Mortgage [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	2,942	4,183
Total Residential Mortgage [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	14,033	13,402
Total Residential Mortgage [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	188	193
Total Residential Mortgage [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	377,574	384,234
Commercial Loans Secured by Real Estate [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	143,139	146,381
Commercial Loans Secured by Real Estate [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	7,109	6,994
Commercial Loans Secured by Real Estate [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	4,603	5,038
Commercial Loans Secured by Real Estate [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	317	0
Commercial Loans Secured by Real Estate [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	155,168	158,413
Commercial and Industrial [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	38,739	41,237
Commercial and Industrial [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	3,683	3,030
Commercial and Industrial [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	3,025	3,810
Commercial and Industrial [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	365	365
Commercial and Industrial [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	45,812	48,442
Political Subdivisions [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	23,928	31,679
Political Subdivisions [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	105	110
Political Subdivisions [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Political Subdivisions [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Political Subdivisions [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	24,033	31,789
Commercial Construction and Land [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	18,744	26,744
Commercial Construction and Land [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	225	231
Commercial Construction and Land [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	472	477
Commercial Construction and Land [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	748	748
Commercial Construction and Land [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	20,189	28,200
Loans Secured by Farmland [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	8,845	9,102
Loans Secured by Farmland [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	767	751
Loans Secured by Farmland [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	1,490	1,517
Loans Secured by Farmland [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	32	33
Loans Secured by Farmland [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	11,134	11,403
Multi-family (5 or more) Residential [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	6,020	6,394
Multi-family (5 or more) Residential [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	329	342
Multi-family (5 or more) Residential [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	48	9
Multi-family (5 or more) Residential [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Multi-family (5 or more) Residential [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	6,397	6,745
Agricultural Loans [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	2,969	2,963
Agricultural Loans [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	36	28
Agricultural Loans [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	56	62
Agricultural Loans [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Agricultural Loans [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	3,061	3,053
Other Commercial Loans [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	543	362
Other Commercial Loans [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Other Commercial Loans [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Other Commercial Loans [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Other Commercial Loans [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	543	362
Total Commercial [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	242,927	264,862
Total Commercial [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	12,254	11,486
Total Commercial [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	9,694	10,913
Total Commercial [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	1,462	1,146
Total Commercial [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	266,337	288,407
Consumer [Member] | Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	10,836	11,053
Consumer [Member] | Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	11	12
Consumer [Member] | Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	212	203
Consumer [Member] | Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	0	1
Consumer [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	11,059	11,269
Pass [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	614,174	642,371
Special Mention [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	15,207	15,681
Substandard [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	23,939	24,518
Doubtful [Member]
Residential Mortgage:
Loans and Leases Receivable, Gross, Carrying Amount	$ 1,650	$ 1,340