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Note 4 - Allowance for Loan Losses (Details Textual) Pure in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Troubled Debt Restructuring	$ 116			$ 116		$ 1,600
Financing Receivable, Modifications, Number of Contracts	0	0		0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0	$ 0		$ 0	$ 0
Financing Receivable, Modifications, Interest Only Payments	4,700			4,700
Minimum [Member]
Financing Receivable, Modifications, Interest Only Payments, Period (Month)			6 months
Maximum [Member]
Financing Receivable, Modifications, Interest Only Payments, Period (Month)			24 months
Performing Financial Instruments [Member]
Financing Receivable, Troubled Debt Restructuring	$ 0			$ 0		$ 7

X

- Definition

Amounts of loans modified allowing interest only payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

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X

- Definition

Period of interest only payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

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X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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X

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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X

- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

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