Note 3 - Loans Receivable - Classifications of Loans Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans and Leases Receivable, Gross	$ 12,472	$ 11,779
Less allowance for loan losses	(86)	(83)	$ (43)
Construction Loan Portfolio Segment [Member] \| Land Acquisition Development And Commercial [Member]
Loans and Leases Receivable, Gross	21,057	27,440
Less allowance for loan losses	(143)	(187)	(453)
Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans and Leases Receivable, Gross	106,622	100,268
Less allowance for loan losses	(879)	(1,047)	(833)
Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans and Leases Receivable, Gross	160,901	140,952
Less allowance for loan losses	(1,514)	(1,001)	(1,012)
Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans and Leases Receivable, Gross	55,719	53,012
Less allowance for loan losses	(423)	(531)	(319)
Equity Lines Portfolio Segment [Member]
Loans and Leases Receivable, Gross	29,235	26,376
Less allowance for loan losses	(287)	(277)	(423)
Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Gross	7,662	7,531
Less allowance for loan losses	(98)	(85)	(65)
Loans and Leases Receivable, Gross	393,668	367,358
Less allowance for loan losses	(3,449)	(3,298)	$ (3,332)
Loans, net	$ 390,219	$ 364,060

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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=66008989&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

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- Definition

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

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- Definition

Amount after allowance and 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 and loans held for sale.

+ 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
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-Subparagraph (SX 210.9-03.7)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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