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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

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