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Note 3 - Debt Securities (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-Sale, Allowance for Credit Loss	$ 0		$ 0	$ 0
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	145		145	145		113
Percentage of Combined Depreciation of Combined Reported Value of Aggregate Securities Portfolio	7.98%		7.98%	7.98%		6.59%
Proceeds from Sale of Debt Securities, Available-for-Sale				$ 38,979	$ 0
Debt Securities, Available-for-Sale, Realized Gain (Loss)	$ 0	$ 0	$ (28)	(21)	$ 0
Debt Securities, Available-for-Sale, Amortized Cost	297,291		297,291	297,291		$ 320,123
Asset Pledged as Collateral [Member]
Debt Securities, Available-for-Sale, Amortized Cost	145,380		145,380	145,380		$ 22,430
Surrey [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Securities	$ 20,930		$ 20,930	$ 20,930

X

- Definition

The amount of securities recognized as of the acquisition date.

+ References

No definition available.

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- Definition

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

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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))
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Amount of allowance for credit 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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Amount of realized gain (loss) on 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/2009/role/commonPracticeRef
-Topic 320
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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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