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Note 4 - Loans Receivable - Loans Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Loans receivable | $ 768,646 |  | $ 895,157 |  |  |
Allowance for credit losses | (8,814) | $ (9,116) | (7,571) | $ (7,899) | $ (8,142) | $ (8,345)
Loans, net | 759,832 |  | 887,586 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Loans receivable | 169,335 |  | 248,595 |  |  |
Allowance for credit losses | (2,789) |  | (1,146) |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Loans receivable | 1,598 |  | 1,623 |  |  |
Allowance for credit losses | (40) | $ (44) | (48) |  |  |
One-to-Four Family Residential Real Estate [Member] | Real Estate Portfolio [Member] |  |  |  |  |  |
Loans receivable | 12,859 |  | 14,829 |  |  |
Allowance for credit losses | (226) |  | (271) |  |  |
Multi-family Mortgage [Member] | Real Estate Portfolio [Member] |  |  |  |  |  |
Loans receivable | 486,050 |  | 521,957 |  |  |
Allowance for credit losses | (4,606) |  | (4,764) |  |  |
Nonresidential Real Estate [Member] | Real Estate Portfolio [Member] |  |  |  |  |  |
Loans receivable | 98,804 |  | 108,153 |  |  |
Allowance for credit losses | $ (1,153) |  | $ (1,342) |  |  |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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