Note 4 - Loans - Loans Modified as TDRs (Details) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Number of Contracts	2	1	5
Pre-Modification Outstanding Recorded Investment	$ 2,529	$ 1,093	$ 1,505
Post-Modification Outstanding Recorded Investment	$ 2,529	$ 1,093	$ 1,505
Commercial Portfolio Segment [Member]
Number of Contracts	0	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 106
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 106
Commercial Real Estate Portfolio Segment [Member]
Number of Contracts	1	1
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Commercial Real Estate [Member]
Number of Contracts	1	0	0
Pre-Modification Outstanding Recorded Investment	$ 2,420	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 2,420	$ 0	$ 0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied Commercial Real Estate [Member]
Number of Contracts	0	1	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 1,093	$ 1,311
Post-Modification Outstanding Recorded Investment	$ 0	$ 1,093	$ 1,311
Residential Portfolio Segment [Member]
Number of Contracts	1
Residential Portfolio Segment [Member] \| Residential [Member]
Number of Contracts	1	0	1
Pre-Modification Outstanding Recorded Investment	$ 109	$ 0	$ 82
Post-Modification Outstanding Recorded Investment	$ 109	$ 0	$ 82
Residential Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Number of Contracts	0	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 6
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 6
Consumer Portfolio Segment [Member]
Number of Contracts	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0

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

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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Amount, after troubled debt restructuring, of modified financing receivable.

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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