Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	$ 11,644		$ 12,316
Loans receivable: collectively evaluated	652,174		618,229
Loans receivable	663,818		630,545
Allowance for loan losses: individually evaluated	600		769
Allowance for loan losses: collectively evaulated	6,304		6,172
Allowance for loan losses	7,300	$ 7,134	7,336	$ 7,267	$ 8,343	$ 8,663
Residential Portfolio Segment [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	1,832		1,682
Loans receivable: collectively evaluated	373,439		364,734
Loans receivable	375,271		366,416
Allowance for loan losses: individually evaluated	136		358
Allowance for loan losses: collectively evaulated	3,450		3,295
Allowance for loan losses	3,586	3,503	3,653	3,696	3,567	3,705
Residential Portfolio Segment [Member] | Home Equity Line of Credit1 [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	39,140		36,629
Loans receivable	39,140		36,629
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	344		322
Allowance for loan losses	344	322	322	277	271	269
Residential Portfolio Segment [Member] | Construction Loans [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	19,651		16,739
Loans receivable	19,651		16,739
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	257		214
Allowance for loan losses	257	207	214	173	153	168
Residential Portfolio Segment [Member] | Senior Lien [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	1,755		1,665
Loans receivable: collectively evaluated	293,223		290,217
Loans receivable	294,978		291,882
Allowance for loan losses: individually evaluated	136		358
Allowance for loan losses: collectively evaulated	2,639		2,583
Allowance for loan losses	2,775	2,774	2,941	2,966	2,863	2,974
Residential Portfolio Segment [Member] | Junior Lien [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	77		17
Loans receivable: collectively evaluated	21,425		21,149
Loans receivable	21,502		21,166
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	210		176
Allowance for loan losses	210	200	176	280	280	294
Commercial Portfolio Segment [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	9,812		10,634
Loans receivable: collectively evaluated	268,634		243,261
Loans receivable	278,446		253,895
Allowance for loan losses: individually evaluated	464		411
Allowance for loan losses: collectively evaulated	2,719		2,732
Allowance for loan losses	3,183	3,098	3,143	3,049	4,254	4,367
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	6,145		6,537
Loans receivable: collectively evaluated	128,918		139,341
Loans receivable	135,063		145,878
Allowance for loan losses: individually evaluated	80		16
Allowance for loan losses: collectively evaulated	1,612		1,742
Allowance for loan losses	1,692	1,736	1,758	1,896	3,081	3,123
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	1,840		1,939
Loans receivable: collectively evaluated	5,986		4,999
Loans receivable	7,826		6,938
Allowance for loan losses: individually evaluated	211		211
Allowance for loan losses: collectively evaulated	85		72
Allowance for loan losses	296	286	283	163	247	267
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	332		663
Loans receivable: collectively evaluated	61,095		49,494
Loans receivable	61,427		50,157
Allowance for loan losses: individually evaluated	75		82
Allowance for loan losses: collectively evaulated	725		606
Allowance for loan losses	800	684	688	626	555	591
Commercial Portfolio Segment [Member] | Political Subdivisions [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	40,908		17,534
Loans receivable	40,908		17,534
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	0		0
Allowance for loan losses	0	0	0	0	0	0
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	1,474		1,470
Loans receivable: collectively evaluated	6,091		6,446
Loans receivable	7,565		7,916
Allowance for loan losses: individually evaluated	98		102
Allowance for loan losses: collectively evaulated	57		63
Allowance for loan losses	155	159	165	96	98	115
Commercial Portfolio Segment [Member] | Multi-family (5 or more) Residential [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	8,561		8,917
Loans receivable	8,561		8,917
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	80		87
Allowance for loan losses	80	81	87	103	105	103
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	21		25
Loans receivable: collectively evaluated	4,266		3,196
Loans receivable	4,287		3,221
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	40		31
Allowance for loan losses	40	29	31	30	30	30
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	12,809		13,334
Loans receivable	12,809		13,334
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	120		131
Allowance for loan losses	120	123	131	135	138	138
Consumer Portfolio Segment [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Loans receivable: individually evaluated	0		0
Loans receivable: collectively evaluated	10,101		10,234
Loans receivable	10,101		10,234
Allowance for loan losses: individually evaluated	0		0
Allowance for loan losses: collectively evaulated	135		145
Allowance for loan losses	135	139	145	127	128	193
Unallocated Financing Receivables [Member]
Note 7 - Loans (Details) - Loan Balances and Allowance for Loan Losses for Each Impairment Method [Line Items]
Allowance for loan losses	$ 396	$ 394	$ 395	$ 395	$ 394	$ 398