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Note 1 - General - Impact of Adoption of New ASU (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Held-to-Maturity, Allowance for Credit Loss	$ 131			$ 0
Allowance for Credit Loss	8,896		$ 7,446	7,446	$ 6,292	$ 5,710
Allowance for credit losses for unfunded commitments			0
Real Estate 1 [Member] | Construction and Land Development [Member]
Allowance for Credit Loss	302		546	546	454	345
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Allowance for Credit Loss	2,433		1,108	1,108	1,064	1,077
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Allowance for Credit Loss	5,145		3,609	3,609	3,573	3,230
Commercial and Industrial Loans [Member]
Allowance for Credit Loss	920		1,874	1,874	931	718
Consumer and Other Loans [Member]
Allowance for Credit Loss	96		309	309	$ 270	$ 340
Accounting Standards Update 2016-13 [Member]
Held-to-Maturity, Allowance for Credit Loss	131	$ 132
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Credit Loss			9,632
Allowance for credit losses for unfunded commitments			153
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Construction and Land Development [Member]
Allowance for Credit Loss			233
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Allowance for Credit Loss			2,517
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Other Real Estate Loans [Member]
Allowance for Credit Loss			5,311
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Commercial and Industrial Loans [Member]
Allowance for Credit Loss			1,487
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Consumer and Other Loans [Member]
Allowance for Credit Loss			84
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Held-to-Maturity, Allowance for Credit Loss			132	134
Allowance for Credit Loss			2,186	2,186
Allowance for credit losses for unfunded commitments			153
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Construction and Land Development [Member]
Allowance for Credit Loss			(313)	(313)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Allowance for Credit Loss			1,409	1,409
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Other Real Estate Loans [Member]
Allowance for Credit Loss			1,702	1,702
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial and Industrial Loans [Member]
Allowance for Credit Loss			(387)	(387)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer and Other Loans [Member]
Allowance for Credit Loss			(225)	(225)
Corporate Debt Securities [Member]
Held-to-Maturity, Allowance for Credit Loss	$ 131		0	0
Corporate Debt Securities [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Held-to-Maturity, Allowance for Credit Loss			132
Corporate Debt Securities [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Held-to-Maturity, Allowance for Credit Loss			$ 132	$ 134

X

- Definition

Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 45
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