Note 6 - Loans Receivable and Allowances for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commercial Real Estate Portfolio Segment [Member]
With no related allowance - Recorded investment	$ 12,305	$ 11,692
With no related allowance - Unpaid principal balance	12,307	11,730
With related allowance - Recorded investment	7,165	511
With related allowance - Unpaid principal balance	7,179	511
Related allowance	1,290	47
Recorded investment	19,470	12,203
Unpaid principal balance	19,486	12,241
Construction and Land Development Portfolio Segment [Member]
With no related allowance - Recorded investment		117
With no related allowance - Unpaid principal balance		2,208
With related allowance - Recorded investment	56
With related allowance - Unpaid principal balance	2,050
Related allowance	56
Recorded investment	56	117
Unpaid principal balance	2,050	2,208
Commercial Portfolio Segment [Member]
With no related allowance - Recorded investment	1,515	2,381
With no related allowance - Unpaid principal balance	2,648	3,683
With related allowance - Recorded investment	3,719	3,112
With related allowance - Unpaid principal balance	6,385	5,779
Related allowance	1,799	1,111
Recorded investment	5,234	5,493
Unpaid principal balance	9,033	9,462
Owner Occupied Real Estate [Member]
With no related allowance - Recorded investment	672	507
With no related allowance - Unpaid principal balance	685	507
With related allowance - Recorded investment	1,859	2,862
With related allowance - Unpaid principal balance	1,860	2,876
Related allowance	544	1,059
Recorded investment	2,531	3,369
Unpaid principal balance	2,545	3,383
Consumer Portfolio Segment [Member]
With no related allowance - Recorded investment	1,092	800
With no related allowance - Unpaid principal balance	1,400	1,084
With related allowance - Recorded investment	292	147
With related allowance - Unpaid principal balance	293	147
Related allowance	71	21
Recorded investment	1,384	947
Unpaid principal balance	1,693	1,231
With no related allowance - Recorded investment	15,584	15,497
With no related allowance - Unpaid principal balance	17,040	19,212
With related allowance - Recorded investment	13,091	6,632
With related allowance - Unpaid principal balance	17,767	9,313
Related allowance	3,760	2,238
Recorded investment	28,675	22,129
Unpaid principal balance	$ 34,807	$ 28,525

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit losses related to recorded investment.

+ 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 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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 (a)(4)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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- Definition

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