Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment of Loans Based On Impairment Method (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 3,558	$ 3,412
Collectively evaluated for impairment	4,762	4,922
Total ending allowance balance	8,320	8,334	6,462	6,155
Loans:
Loans individually evaluated for impairment	20,578	20,169
Loans collectively evaluated for impairment	573,939	574,599
Total ending loans balance	594,517	594,768
Residential Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	1,465	1,426
Total ending allowance balance	1,465	1,426	1,437	1,169
Loans:
Loans individually evaluated for impairment	1,411	1,415
Loans collectively evaluated for impairment	219,899	222,213
Total ending loans balance	221,310	223,628
Commercial Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	2,533	2,506
Collectively evaluated for impairment	1,677	1,689
Total ending allowance balance	4,210	4,195	2,845	2,914
Loans:
Loans individually evaluated for impairment	11,590	11,711
Loans collectively evaluated for impairment	165,603	165,901
Total ending loans balance	177,193	177,612
Commercial and Industrial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	1,021	900
Collectively evaluated for impairment	717	702
Total ending allowance balance	1,738	1,602	1,331	1,279
Loans:
Loans individually evaluated for impairment	7,358	6,824
Loans collectively evaluated for impairment	82,089	77,174
Total ending loans balance	89,447	83,998
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	4	6
Collectively evaluated for impairment	903	1,105
Total ending allowance balance	907	1,111	849	793
Loans:
Loans individually evaluated for impairment	219	219
Loans collectively evaluated for impairment	106,348	109,311
Total ending loans balance	$ 106,567	$ 109,530

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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The balance of financing receivables that were individually evaluated for impairment.

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-Publisher FASB

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-Topic 310

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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

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