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Note 19 - Fair Value Measurements (Details Textual)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Number of Foreclosed Real Estate Properties	0
Foreclosed Real Estate [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	$ 0	$ 284,000	$ 419,000
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	$ 0	$ 22,000	$ 231,000
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Minimum [Member]
Fair Value Inputs, Estimated Selling Costs	10.00%	0.00%
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Maximum [Member]
Fair Value Inputs, Estimated Selling Costs	66.00%	66.00%
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Weighted Average [Member]
Fair Value Inputs, Estimated Selling Costs	27.00%	24.00%
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member]
Fair Value Inputs, Estimated Selling Costs		38.00%

X

- Definition

Represents the fair value inputs estimated selling costs.

+ References

No definition available.

+ Details

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X

- Definition

The number of foreclosed real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

Amount of write-down or reserve recognized in the income statement on real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Footnote 5))
-URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024

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