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Note 3 - Loans - Summary of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jan. 01, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Loans	$ 952,499		$ 920,523	$ 906,514
Allowance for credit losses	(8,896)	$ (7,446)	(7,446)	(6,292)	$ (5,710)
Loans, net	943,603		913,077
Commercial and Industrial Loans [Member]
Loans	117,130		111,225	112,145
Allowance for credit losses	(920)	(1,874)	(1,874)	(931)	(718)
Consumer and Other Loans [Member]
Loans	11,014		7,581	8,099
Allowance for credit losses	(96)	(309)	(309)	(270)	(340)
Construction and Land Development [Member] | Real Estate 1 [Member]
Loans	50,405		51,840	51,352
Allowance for credit losses	(302)	(546)	(546)	(454)	(345)
Secured by Multi-family Residential Properties [Member] | Real Estate 1 [Member]
Loans	340,773		331,421	317,414
Allowance for credit losses	(2,433)	(1,108)	(1,108)	(1,064)	(1,077)
Other Real Estate Loans [Member] | Real Estate 1 [Member]
Loans	433,177		418,456	417,504
Allowance for credit losses	$ (5,145)	$ (3,609)	(3,609)	$ (3,573)	$ (3,230)
Consumer and Other Loans [Member] | Consumer and Other Loans [Member]
Loans			$ 7,581

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