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Note 7 - Loans and Related Allowance for Loan Losses (Details) - Additional Information on Impaired Loans - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Total:
Average recorded investment	$ 14,665	$ 13,214
Interest income recognized	197	111
Commercial and Industrial [Member]
Total:
Average recorded investment	1,337	1,227
Interest income recognized	13	14
Real Estate Construction Porfolio Segment [Member]
Total:
Average recorded investment	1,620	2,882
Interest income recognized	25	20
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Total:
Average recorded investment	3,983	4,833
Interest income recognized	36	38
Commercial Portfolio Segment [Member]
Total:
Average recorded investment	7,719	4,266
Interest income recognized	123	39
Consumer Portfolio Segment [Member]
Total:
Average recorded investment	6	$ 6
Interest income recognized	$ 0

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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