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Note 12 - Fair Value Measurements - Quantitative Information About Level 3 Fair Value Measurements (Details) - Impaired Loans [Member] - Fair Value, Nonrecurring [Member] $ in Thousands		Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Assets, Fair Value		$ 3,572	$ 406
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value		$ 3,572	$ 406
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cost to Sell [Member]
Measurement input	[1]	0.1000	0.1000
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate [Member]
Measurement input	[1]	6.50
Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Property Appraisals [Member]
Assets, Fair Value		$ 2,205	$ 406
Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member]
Assets, Fair Value		$ 1,367
[1] Unobservable inputs were weighted by the relative fair value of the instruments.

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- Definition

Value of input used to measure impaired loans.

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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