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Note 7 - Loans and Related Allowance for Loan Losses (Details) - Classes of the Loan Portfolio Summarized by Credit Quality - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans, total	$ 530,356	$ 533,710
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	512,281	512,697
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	2,201	5,297
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	15,755	15,586
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	119	130
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	47,436	42,536
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	45,742	40,560
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	485	242
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	1,209	1,734
Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total		0
Real Estate Construction Porfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	21,005	22,137
Real Estate Construction Porfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	20,886	22,007
Real Estate Construction Porfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total		0
Real Estate Construction Porfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	0
Real Estate Construction Porfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	119	130
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	238,489	232,478
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	231,785	225,945
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	493	728
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	6,211	5,805
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	0
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	218,363	231,701
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	208,808	219,331
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	1,223	4,327
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	8,332	8,043
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	5,063	4,858
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	5,060	4,854
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	0
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	3	4
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	$ 0	$ 0

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

Reference 2: 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=66008989&loc=d3e5074-111524

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