Note 7 - Loans And Related Allowance For Loan Losses (Details) - Classes of the Loan Portfolio Summarized by Credit Quality (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	$ 419,060	$ 408,433
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	48,085	59,390
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	873	678
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	1,264	2,061
Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	43	59
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	50,265	62,188
Real Estate Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	20,615	17,601
Real Estate Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	912	0
Real Estate Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	3,960	4,921
Real Estate Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	0	0
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	25,487	22,522
Residential Real Estate Mortgage [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	190,408	190,967
Residential Real Estate Mortgage [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	964	758
Residential Real Estate Mortgage [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	11,940	12,147
Residential Real Estate Mortgage [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	0	0
Residential Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	203,312	203,872
Commercial Real Estate Mortgage [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	127,634	106,509
Commercial Real Estate Mortgage [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	2,256	1,928
Commercial Real Estate Mortgage [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	5,870	7,297
Commercial Real Estate Mortgage [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	0	0
Commercial Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	135,760	115,734
Consumer Installment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	4,218	4,084
Consumer Installment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	0	0
Consumer Installment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	18	33
Consumer Installment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	0	0
Consumer Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	4,236	4,117
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	390,960	378,551
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	5,005	3,364
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	23,052	26,459
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable	$ 43	$ 59