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Note 4 - Loans Receivable - Allowance for Loan Losses and Loans Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Loan balances, individually evaluated for impairment | $ 25,710 |  | $ 2,712 |  |  |
Loan balances, collectively evaluated for impairment | 1,088,453 |  | 1,232,160 |  |  |
Loans receivable | 1,114,163 |  | 1,234,872 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 8,559 |  | 8,129 |  |  |
Allowance for loan losses | 8,559 | $ 9,226 | 8,129 | $ 7,386 | $ 7,202 | $ 6,715
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member] |  |  |  |  |  |
Loan balances, individually evaluated for impairment | 72 |  | 752 |  |  |
Loan balances, collectively evaluated for impairment | 19,161 |  | 22,381 |  |  |
Loans receivable | 19,233 |  | 23,133 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 296 |  | 281 |  |  |
Allowance for loan losses | 296 | 326 | 281 | 315 | 286 | 331
Real Estate Portfolio [Member] | Multi-family Mortgage [Member] |  |  |  |  |  |
Loan balances, individually evaluated for impairment | 0 |  | 473 |  |  |
Loan balances, collectively evaluated for impairment | 528,251 |  | 536,921 |  |  |
Loans receivable | 528,251 |  | 537,394 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 4,547 |  | 4,017 |  |  |
Allowance for loan losses | 4,547 | 4,679 | 4,017 | 3,566 | 3,632 | 3,377
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member] |  |  |  |  |  |
Loan balances, individually evaluated for impairment | 0 |  | 0 |  |  |
Loan balances, collectively evaluated for impairment | 117,641 |  | 119,705 |  |  |
Loans receivable | 117,641 |  | 119,705 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 1,150 |  | 1,234 |  |  |
Allowance for loan losses | 1,150 | 1,245 | 1,234 | 1,162 | 1,093 | 1,311
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Loan balances, individually evaluated for impairment | 25,638 |  | 1,487 |  |  |
Loan balances, collectively evaluated for impairment | 422,049 |  | 551,569 |  |  |
Loans receivable | 447,687 |  | 553,056 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 2,535 |  | 2,548 |  |  |
Allowance for loan losses | 2,535 | 2,943 | 2,548 | 2,231 | 2,149 | 1,652
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Loan balances, individually evaluated for impairment | 0 |  | 0 |  |  |
Loan balances, collectively evaluated for impairment | 1,351 |  | 1,584 |  |  |
Loans receivable | 1,351 |  | 1,584 |  |  |
Allowance for loan losses, individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses, collectively evaluated for impairment | 31 |  | 49 |  |  |
Allowance for loan losses | $ 31 | $ 33 | $ 49 | $ 112 | $ 42 | $ 44

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References No definition available. + Details
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