Note 8 - Loans and Allowance for Loan Losses (Details) - Loan Portfolio Summarized by the Aggregate Pass Ratings (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	$ 521,838	$ 501,752
Commercial:Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	108,225	100,943
Commercial:Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	55	59
Commercial:Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	9,247	10,337
Commercial:Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	117,527	111,339
Commercial:Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	14,712	13,751
Commercial:Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	796	827
Commercial:Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	1,127	1,351
Commercial:Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	16,635	15,929
Commercial:Secured by Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	164,109	163,349
Commercial:Secured by Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	4,158	4,199
Commercial:Secured by Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	22,961	23,054
Commercial:Secured by Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	191,228	190,602
Commercial Secured By Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	44,186	43,854
Commercial Secured By Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	186	187
Commercial Secured By Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	3,533	3,631
Commercial Secured By Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	47,905	47,672
State And Political Subdivisions [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	44,797	33,488
State And Political Subdivisions [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	272	285
State And Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	45,069	33,773
Loans To Depository Institutions [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	750	1,250
Loans To Depository Institutions [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	750	1,250
Indirect Lease Financing [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	7,948	8,199
Indirect Lease Financing [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	145	165
Indirect Lease Financing [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	8,093	8,364
Excluding Retail Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	384,727	364,834
Excluding Retail Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	5,195	5,272
Excluding Retail Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	37,285	38,823
Excluding Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial Loans	$ 427,207	$ 408,929