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Note 3 - Debt Securities (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	112	113
Percentage of Combined Depreciation of Combined Reported Value of Aggregate Securities Portfolio	5.02%	6.59%
Proceeds from Sale of Debt Securities, Available-for-Sale	$ 38,979	$ 0	$ 370
Debt Securities, Available-for-Sale, Realized Gain	30
Debt Securities, Available-for-Sale, Realized Loss	51
Debt Securities, Available-for-Sale, Amortized Cost	295,045	320,123
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	5,750	1,500
US Treasury Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	146,653	161,617
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	19,528	23,480
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	28,566	37,046
Mortgage-backed Agency Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	94,548	96,480
Asset Pledged as Collateral [Member]
Debt Securities, Available-for-Sale, Amortized Cost	$ 145,090	$ 22,430

X

- Definition

Represents the percentage of combined depreciation of combined reported value of aggregate securities portfolio.

+ References

No definition available.

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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