Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Past Due Financing Receivables (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	$ 470,284	$ 465,164
Loans, 30-59 days past due	2,547	2,471
Loans, 60-89 days past due	785	434
Loans, 90+ days past due	2,202	2,515
Loans, total past due	5,534	5,420
Loans, total	475,818	470,584
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	48,522	60,296
Loans, 30-59 days past due	316	349
Loans, 60-89 days past due	77	68
Loans, 90+ days past due	1	31
Loans, total past due	394	448
Loans, total	48,916	60,744
Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	24,650	30,296
Loans, 60-89 days past due	113
Loans, total past due	113
Loans, total	24,763	30,296
Residential Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	227,591	223,209
Loans, 30-59 days past due	2,147	2,065
Loans, 60-89 days past due	465	363
Loans, 90+ days past due	1,633	1,915
Loans, total past due	4,245	4,343
Loans, total	231,836	227,552
Commercial Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	164,917	146,816
Loans, 30-59 days past due	72	30
Loans, 60-89 days past due	123
Loans, 90+ days past due	568	567
Loans, total past due	763	597
Loans, total	165,680	147,413
Consumer Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, current balance	4,604	4,547
Loans, 30-59 days past due	12	27
Loans, 60-89 days past due	7	3
Loans, 90+ days past due		2
Loans, total past due	19	32
Loans, total	$ 4,623	$ 4,579

Financing receivables that are less than 60 days past due but more than 29 days past due.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

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- Definition

Financing receivables that are less than 90 days past due but more than 59 days past due.

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- Definition

Financing receivables that are current.

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- Definition

Financing receivables that are equal to or greater than 90 days past due.

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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