Note 4 - Loans and Allowance for Loan Losses (Details) - Aging of the Recorded Investment of Past Due Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 3,391	$ 5,670
60-89 Days Past Due	625	1,634
90 or More Days Past Due	3,511	3,428
Total Past Due	7,527	10,732
Loans Not Past Due	566,800	555,587
Total	574,327	566,319
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2,241	3,922
60-89 Days Past Due	508	1,324
90 or More Days Past Due	2,994	2,620
Total Past Due	5,743	7,866
Loans Not Past Due	208,081	206,142
Total	213,824	214,008
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	117	206
60-89 Days Past Due		34
90 or More Days Past Due	465	683
Total Past Due	582	923
Loans Not Past Due	93,590	93,663
Total	94,172	94,586
Commercial Real Estate Nonowner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or More Days Past Due		52
Total Past Due		52
Loans Not Past Due	62,661	62,056
Total	62,661	62,108
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due		60
Total Past Due		60
Loans Not Past Due	30,106	28,912
Total	30,106	28,972
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	66	193
60-89 Days Past Due		115
90 or More Days Past Due	2	21
Total Past Due	68	329
Loans Not Past Due	72,857	64,036
Total	72,925	64,365
Automobile Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	435	638
60-89 Days Past Due	83	123
90 or More Days Past Due	12	13
Total Past Due	530	774
Loans Not Past Due	39,093	38,037
Total	39,623	38,811
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 or More Days Past Due	38	38
Total Past Due	38	38
Loans Not Past Due	17,489	17,710
Total	17,527	17,748
Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	532	651
60-89 Days Past Due	34	38
90 or More Days Past Due		1
Total Past Due	566	690
Loans Not Past Due	42,923	45,031
Total	$ 43,489	$ 45,721