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Note 4 - Loans Receivable - Allowance for Loan Losses and Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Loan balances, individually evaluated for impairment	$ 22,473		$ 22,049
Loan balances, collectively evaluated for impairment	909,365		1,037,057
Loans receivable	931,838		1,059,106
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	7,899		8,345
Allowance for loan losses	7,899	$ 8,142	8,345	$ 8,559	$ 9,226	$ 8,129
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loan balances, individually evaluated for impairment	57		67
Loan balances, collectively evaluated for impairment	15,577		18,878
Loans receivable	15,634		18,945
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	294		295
Allowance for loan losses	294	324	295	296	326	281
Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loan balances, individually evaluated for impairment	1,458		0
Loan balances, collectively evaluated for impairment	522,882		527,460
Loans receivable	524,340		527,460
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	4,805		4,549
Allowance for loan losses	4,805	4,843	4,549	4,547	4,679	4,017
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loan balances, individually evaluated for impairment	393		0
Loan balances, collectively evaluated for impairment	109,406		118,016
Loans receivable	109,799		118,016
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	1,415		1,166
Allowance for loan losses	1,415	1,397	1,166	1,150	1,245	1,234
Commercial Portfolio Segment [Member]
Loan balances, individually evaluated for impairment	20,565		21,982
Loan balances, collectively evaluated for impairment	259,653		371,339
Loans receivable	280,218		393,321
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	1,329		2,303
Allowance for loan losses	1,329	1,524	2,303	2,535	2,943	2,548
Consumer Portfolio Segment [Member]
Loan balances, individually evaluated for impairment	0		0
Loan balances, collectively evaluated for impairment	1,847		1,364
Loans receivable	1,847		1,364
Allowance for loans individually evaluated	0		0
Allowance for loans collectively evaluated	56		32
Allowance for loan losses	$ 56	$ 54	$ 32	$ 31	$ 33	$ 49

X

- Definition

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

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