Note 3 - Loans Receivable - Past Due and Non-accrual Status of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivables, 30 to 59 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans, past due
Financing Receivables, 30 to 59 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Land Acquisition Development And Commercial [Member]
Loans, past due
Financing Receivables, 30 to 59 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans, past due		297
Financing Receivables, 30 to 59 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans, past due	571	44
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans, past due	33	52
Financing Receivables, 30 to 59 Days Past Due [Member] \| Equity Lines Portfolio Segment [Member]
Loans, past due		105
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans, past due	26
Financing Receivables, 30 to 59 Days Past Due [Member]
Loans, past due	630	498
Financing Receivables, 60 to 89 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Land Acquisition Development And Commercial [Member]
Loans, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans, past due	225
Financing Receivables, 60 to 89 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans, past due	1,298
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans, past due		84
Financing Receivables, 60 to 89 Days Past Due [Member] \| Equity Lines Portfolio Segment [Member]
Loans, past due	106
Financing Receivables, 60 to 89 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans, past due	2
Financing Receivables, 60 to 89 Days Past Due [Member]
Loans, past due	1,631	84
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Construction Loan Portfolio Segment [Member] \| Land Acquisition Development And Commercial [Member]
Loans, past due	8	11
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans, past due	577	50
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans, past due		792
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans, past due		35
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Equity Lines Portfolio Segment [Member]
Loans, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans, past due	585	888
Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans, past due
Loans, current	12,472	11,779
Loans and Leases Receivable, Gross	12,472	11,779
Loans, nonaccrual Loans
Construction Loan Portfolio Segment [Member] \| Land Acquisition Development And Commercial [Member]
Loans, past due	8	11
Loans, current	21,049	27,429
Loans and Leases Receivable, Gross	21,057	27,440
Loans, nonaccrual Loans	8	11
Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans, past due	802	347
Loans, current	105,820	99,921
Loans and Leases Receivable, Gross	106,622	100,268
Loans, nonaccrual Loans	577
Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans, past due	1,869	836
Loans, current	159,032	140,116
Loans and Leases Receivable, Gross	160,901	140,952
Loans, nonaccrual Loans	1,652	368
Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans, past due	33	171
Loans, current	55,686	52,841
Loans and Leases Receivable, Gross	55,719	53,012
Loans, nonaccrual Loans	11	47
Equity Lines Portfolio Segment [Member]
Loans, past due	106	105
Loans, current	29,129	26,271
Loans and Leases Receivable, Gross	29,235	26,376
Loans, nonaccrual Loans
Consumer Portfolio Segment [Member]
Loans, past due	28
Loans, current	7,634	7,531
Loans and Leases Receivable, Gross	7,662	7,531
Loans, nonaccrual Loans
Loans, past due	2,846	1,470
Loans, current	390,822	365,888
Loans and Leases Receivable, Gross	393,668	367,358
Loans, nonaccrual Loans	$ 2,248	$ 426

Financing receivables that are current.

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=66008989&loc=SL6953401-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: 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=66008989&loc=SL6953401-111524

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. 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

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