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Note 4 - Loans Receivable - Allowance for Loan Losses and Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Loan balances, individually evaluated for impairment	$ 9,085	$ 2,712
Loan balances, collectively evaluated for impairment	1,226,235	1,232,160
Loans receivable	1,235,320	1,234,872
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	10,032	8,129
Allowance for loan losses	10,032	8,129	$ 6,786	$ 6,715
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loan balances, individually evaluated for impairment	89	752
Loan balances, collectively evaluated for impairment	21,386	22,381
Loans receivable	21,475	23,133
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	354	281
Allowance for loan losses	354	281	315	331
Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loan balances, individually evaluated for impairment	148	473
Loan balances, collectively evaluated for impairment	544,525	536,921
Loans receivable	544,673	537,394
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	4,714	4,017
Allowance for loan losses	4,714	4,017	3,390	3,377
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loan balances, individually evaluated for impairment	0	0
Loan balances, collectively evaluated for impairment	123,360	119,705
Loans receivable	123,360	119,705
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	1,347	1,234
Allowance for loan losses	1,347	1,234	957	1,311
Commercial Portfolio Segment [Member]
Loan balances, individually evaluated for impairment	8,848	1,487
Loan balances, collectively evaluated for impairment	535,368	551,569
Loans receivable	544,216	553,056
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	3,576	2,548
Allowance for loan losses	3,576	2,548	2,078	1,652
Consumer Portfolio Segment [Member]
Loan balances, individually evaluated for impairment	0	0
Loan balances, collectively evaluated for impairment	1,596	1,584
Loans receivable	1,596	1,584
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	41	49
Allowance for loan losses	$ 41	$ 49	$ 46	$ 44

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

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Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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