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Note 4 - Loans and Related Allowance for Loan Losses (Details) - Classes of the Loan Portfolio Summarized by Credit Quality - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans, total	$ 533,710	$ 470,584
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	512,697	448,759
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	5,297	4,987
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	15,586	16,211
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	130	627
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	42,536	34,928
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	40,560	33,160
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	242	0
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	1,734	1,730
Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	38
Real Estate Construction Porfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	22,137	30,296
Real Estate Construction Porfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	22,007	29,212
Real Estate Construction Porfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	0	495
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	130	589
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	232,478	210,096
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	225,945	200,928
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	728	584
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	5,805	8,584
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	231,701	190,685
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	219,331	180,899
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	4,327	3,908
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	8,043	5,878
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	4,858	4,579
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, total	4,854	4,572
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	4	7
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=28367877&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=49124121&loc=d3e5074-111524

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