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Note 3 - Loans and Allowance for Loan Losses - Summary of Loans by Major Category (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Loans | $ 126,080 | $ 120,783 |  |
Net deferred loan costs | 934 | 1,016 |  |
Allowance for credit losses on loans | (1,177) | (1,176) | $ (979) | $ (624)
Loans, net | 125,837 | 120,623 |  |
First Mortgage Loans [Member] |  |  |  |
Loans | 125,854 | 120,535 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Loans | 226 | 248 |  |
Allowance for credit losses on loans | (2) | (1) | (2) | (5)
One To Four Family Residential [Member] | First Mortgage Loans [Member] |  |  |  |
Loans | 115,700 | 111,081 |  |
Allowance for credit losses on loans | (1,091) | (1,094) | (890) | (581)
Multifamily [Member] | First Mortgage Loans [Member] |  |  |  |
Loans | 3,081 | 3,111 |  |
Allowance for credit losses on loans | (36) | (40) | (41) | (19)
Commercial Real Estate [Member] | First Mortgage Loans [Member] |  |  |  |
Loans | 3,828 | 3,835 |  |
Allowance for credit losses on loans | (37) | (37) | (46) | (19)
Construction Loans [Member] | First Mortgage Loans [Member] |  |  |  |
Loans | 3,245 | 2,508 |  |
Allowance for credit losses on loans | $ (11) | $ (4) | $ 0 | $ 0

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