Note 7 - Intangible Assets and Loan Servicing (Details) [Line Items]

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- Definition

Amount of unpaid principal balance of mortgage loans serviced for others.

+ References

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- Definition

Amount of gain (loss) on sale or disposal of intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7,9)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

Amount of increase (decrease) of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit, from purchase accounting adjustments.

+ References

No definition available.

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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- Definition

Discount rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122596-111746

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Note 7 - Intangible Assets and Loan Servicing (Details Textual) - USD ($)			12 Months Ended
	Nov. 26, 2014	Jan. 16, 2014	Dec. 31, 2017	Dec. 31, 2016
Note 7 - Intangible Assets and Loan Servicing (Details) [Line Items]
Servicing Asset Loans Unpaid Principal Balance			$ 77,170,000	$ 78,380,000
Servicing Asset at Fair Value, Amount			$ 585,000	$ 579,000
Internet Domain Names [Member]
Note 7 - Intangible Assets and Loan Servicing (Details) [Line Items]
Gain (Loss) on Disposition of Intangible Assets	$ 1,000,000
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments		$ 8,000
Minimum [Member]
Note 7 - Intangible Assets and Loan Servicing (Details) [Line Items]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate			13.00%	14.00%
Maximum [Member]
Note 7 - Intangible Assets and Loan Servicing (Details) [Line Items]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate			15.00%	16.00%