Note 4 - Loans and Allowance for Loan Losses - Recorded Investment In Nonperforming Loans by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Nonaccrual	$ 6,423	$ 8,380
Restructured Loans	22,942	23,831
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Construction and Land Development [Member]
Nonaccrual	712	1,567
Restructured Loans	3,637	3,674
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Residential [Member]
Nonaccrual	2,316	2,485
Restructured Loans	4,006	4,127
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Farmland and Other Commercial Enterprises [Member]
Nonaccrual	3,383	4,266
Restructured Loans	14,787	15,503
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Nonaccrual		44
Restructured Loans	377	384
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial Other [Member]
Nonaccrual		8
Restructured Loans		0
Loans Past Due 90 Days or More and Still Accruing	0	0
Consumer Portfolio Segment [Member] \| Consumer Secured [Member]
Nonaccrual	4	10
Restructured Loans	0	0
Loans Past Due 90 Days or More and Still Accruing	0	0
Consumer Portfolio Segment [Member] \| Consumer Unsecured [Member]
Nonaccrual	8	0
Restructured Loans	135	143
Loans Past Due 90 Days or More and Still Accruing	$ 0	$ 0

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ 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

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+ References

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