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Note 3 - Loans and Allowance for Loan Losses - Aging of Bank's Loan Portfolio (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Loans | $ 126,080 | $ 120,783
Non-accrual | 237 | 200
First Mortgage Loans [Member] |  |
Loans | 125,854 | 120,535
First Mortgage Loans [Member] | One To Four Family Residential [Member] |  |
Loans | 115,700 | 111,081
Non-accrual | 237 | 200
First Mortgage Loans [Member] | Multifamily [Member] |  |
Loans | 3,081 | 3,111
Non-accrual | 0 | 0
First Mortgage Loans [Member] | Commercial Real Estate [Member] |  |
Loans | 3,828 | 3,835
Non-accrual | 0 | 0
First Mortgage Loans [Member] | Construction Loans [Member] |  |
Loans | 3,245 | 2,508
Non-accrual | 0 | 0
Consumer Portfolio Segment [Member] |  |
Loans | 226 | 248
Non-accrual | 0 | 0
Financial Asset, 31 to 89 Days Past Due [Member] |  |
Loans | 0 | 131
Financial Asset, 31 to 89 Days Past Due [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member] |  |
Loans | 0 | 131
Financial Asset, 31 to 89 Days Past Due [Member] | First Mortgage Loans [Member] | Multifamily [Member] |  |
Loans | 0 | 0
Financial Asset, 31 to 89 Days Past Due [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member] |  |
Loans | 0 | 0
Financial Asset, 31 to 89 Days Past Due [Member] | First Mortgage Loans [Member] | Construction Loans [Member] |  |
Loans | 0 | 0
Financial Asset, 31 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | First Mortgage Loans [Member] | Multifamily [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | First Mortgage Loans [Member] | Construction Loans [Member] |  |
Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Loans | 0 | 0
Financial Asset, Past Due [Member] |  |
Loans | 237 | 331
Financial Asset, Past Due [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member] |  |
Loans | 237 | 331
Financial Asset, Past Due [Member] | First Mortgage Loans [Member] | Multifamily [Member] |  |
Loans | 0 | 0
Financial Asset, Past Due [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member] |  |
Loans | 0 | 0
Financial Asset, Past Due [Member] | First Mortgage Loans [Member] | Construction Loans [Member] |  |
Loans | 0 | 0
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Loans | 0 | 0
Financial Asset, Not Past Due [Member] |  |
Loans | 125,843 | 120,452
Financial Asset, Not Past Due [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member] |  |
Loans | 115,463 | 110,750
Financial Asset, Not Past Due [Member] | First Mortgage Loans [Member] | Multifamily [Member] |  |
Loans | 3,081 | 3,111
Financial Asset, Not Past Due [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member] |  |
Loans | 3,828 | 3,835
Financial Asset, Not Past Due [Member] | First Mortgage Loans [Member] | Construction Loans [Member] |  |
Loans | 3,245 | 2,508
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Loans | $ 226 | $ 248

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