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Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	$ 5,444,000	$ 29,434,000
Total nonperforming loans	5,444,000	29,434,000
Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Originated Loan [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Nonaccrual loans	1,954,000	26,049,000
Total nonperforming loans	1,954,000	26,049,000
Total nonperforming loans	1,954,000	26,049,000
Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	5,000	26,000
Acquired Loan [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	5,000	26,000
Nonaccrual loans	3,485,000	3,359,000
Total nonperforming loans	3,490,000	3,385,000
Total nonperforming loans	3,490,000	3,385,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	2,646,000	25,234,000
Total nonperforming loans	2,646,000	25,234,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	458,000	6,478,000
Total nonperforming loans	458,000	6,478,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	155,000	209,000
Total nonperforming loans	155,000	209,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	1,797,000	18,063,000
Total nonperforming loans	1,797,000	18,063,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	79,000	378,000
Total nonperforming loans	79,000	378,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	157,000	106,000
Total nonperforming loans	157,000	106,000
Commercial Portfolio Segment [Member] | Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	2,798,000	4,200,000
Total nonperforming loans	2,798,000	4,200,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	771,000	800,000
Total nonperforming loans	771,000	800,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Total nonperforming loans	2,027,000	3,400,000
Total nonperforming loans	2,027,000	3,400,000
Retail Portfolio Segment [Member] | Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	5,000	26,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	5,000	26,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	$ 0	$ 0

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+ References

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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
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
-Paragraph 7
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