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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Major Classifications of Net Loans - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	$ 510,232		$ 470,584
Less: Allowance for loan and lease losses	6,320	$ 6,346	6,846	$ 7,288	$ 7,129	$ 7,046
Net loans	503,912		463,738
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	53,154		60,744
Less: Allowance for loan and lease losses	578	610	642	686	596	614
Real Estate Construction Porfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	17,576		30,296
Less: Allowance for loan and lease losses	334	363	868	843	423	576
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	260,291		227,552
Less: Allowance for loan and lease losses	3,426	3,347	3,703	3,950	4,130	3,664
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	174,336		147,413
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Gross	4,875		4,579
Less: Allowance for loan and lease losses	$ 43	$ 48	$ 57	$ 55	$ 55	$ 22

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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