Note 5 - Allowance for Loan Losses on Loans and Nonperforming Assets (Details Textual) $ in Thousands	12 Months Ended
Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Financing Receivable, Modifications, Number of Contracts	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modified, Accumulated		$ 3,032
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate, Owner Occupied [Member] \| Special Mention [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 347

Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-33

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481746/310-40-50-4

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant