Note 2 - Loans Receivable - Credit Quality Indicators (Details) - USD ($) | 9 Months Ended | 12 Months Ended |
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 |
Loans receivable, before allowance and fee | $ 30,854,147 | | $ 32,039,004 |
Financing receivable, originated current year | 686,000 | | 1,377,000 |
Financing receivable, originated year two | 2,021,000 | | 5,581,000 |
Financing receivable, originated year three | 5,455,000 | | 5,430,000 |
Financing receivable, originated year four | 5,247,000 | | 4,764,000 |
Financing receivable, originated year five | 4,051,000 | | 1,771,000 |
Financing receivable, originated prior | 13,394,000 | | 13,116,000 |
Financing receivable, originated current year, write offs | 0 | | 0 |
Financing receivable, originated year two, write offs | 0 | | 0 |
Financing receivable, originated year three, write offs | 0 | | 0 |
Financing receivable, originated year four, write offs | 0 | | 0 |
Financing receivable, originated year five, write offs | 0 | | 0 |
Financing receivable, originated prior, write offs | 15,000 | | 0 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 15,000 | $ 0 | 0 |
Pass [Member] | | | |
Loans receivable, before allowance and fee | 30,854,000 | | 32,005,000 |
Financing receivable, originated current year | 686,000 | | 1,377,000 |
Financing receivable, originated year two | 2,021,000 | | 5,581,000 |
Financing receivable, originated year three | 5,455,000 | | 5,430,000 |
Financing receivable, originated year four | 5,247,000 | | 4,764,000 |
Financing receivable, originated year five | 4,051,000 | | 1,771,000 |
Financing receivable, originated prior | 13,394,000 | | 13,082,000 |
Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Substandard [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 34,000 |
Doubtful [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Classified [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 34,000 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 34,000 |
Real Estate Loan [Member] | | | |
Loans receivable, before allowance and fee | 30,550,474 | | 31,713,417 |
Share Loans [Member] | | | |
Loans receivable, before allowance and fee | 303,673 | | 325,587 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 212,000 |
Financing receivable, originated year three | 194,000 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 50,000 |
Financing receivable, originated prior | 110,000 | | 64,000 |
Financing receivable, originated current year, write offs | 0 | | 0 |
Financing receivable, originated year two, write offs | 0 | | 0 |
Financing receivable, originated year three, write offs | 0 | | 0 |
Financing receivable, originated year four, write offs | 0 | | 0 |
Financing receivable, originated year five, write offs | 0 | | 0 |
Financing receivable, originated prior, write offs | 0 | | 0 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | | 0 |
Share Loans [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 304,000 | | 326,000 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 212,000 |
Financing receivable, originated year three | 194,000 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 50,000 |
Financing receivable, originated prior | 110,000 | | 64,000 |
Share Loans [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Share Loans [Member] | Substandard [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Share Loans [Member] | Doubtful [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Share Loans [Member] | Classified [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | | | |
Loans receivable, before allowance and fee | 29,926,433 | | 30,988,366 |
Financing receivable, originated current year | 686,000 | | 1,358,000 |
Financing receivable, originated year two | 2,021,000 | | 5,369,000 |
Financing receivable, originated year three | 5,261,000 | | 5,430,000 |
Financing receivable, originated year four | 5,247,000 | | 4,764,000 |
Financing receivable, originated year five | 4,051,000 | | 1,721,000 |
Financing receivable, originated prior | 12,660,000 | | 12,346,000 |
Financing receivable, originated current year, write offs | 0 | | 0 |
Financing receivable, originated year two, write offs | 0 | | 0 |
Financing receivable, originated year three, write offs | 0 | | 0 |
Financing receivable, originated year four, write offs | 0 | | 0 |
Financing receivable, originated year five, write offs | 0 | | 0 |
Financing receivable, originated prior, write offs | 15,000 | | 0 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 15,000 | | 0 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 29,926,000 | | 30,954,000 |
Financing receivable, originated current year | 686,000 | | 1,358,000 |
Financing receivable, originated year two | 2,021,000 | | 5,369,000 |
Financing receivable, originated year three | 5,261,000 | | 5,430,000 |
Financing receivable, originated year four | 5,247,000 | | 4,764,000 |
Financing receivable, originated year five | 4,051,000 | | 1,721,000 |
Financing receivable, originated prior | 12,660,000 | | 12,312,000 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Substandard [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 34,000 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Doubtful [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Classified [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 34,000 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 34,000 |
Residential Portfolio Segment [Member] | One to Four Family [Member] | | | |
Loans receivable, before allowance and fee | 28,618,000 | | 29,964,000 |
Construction Portfolio Segment [Member] | Real Estate Loan [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 18,400 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | | 0 |
Construction Portfolio Segment [Member] | Real Estate Loan [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 18,000 |
Construction Portfolio Segment [Member] | Real Estate Loan [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Construction Portfolio Segment [Member] | Real Estate Loan [Member] | Substandard [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Construction Portfolio Segment [Member] | Real Estate Loan [Member] | Doubtful [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Construction Portfolio Segment [Member] | One to Four Family [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Financing receivable, originated current year, write offs | 0 | | 0 |
Financing receivable, originated year two, write offs | 0 | | 0 |
Financing receivable, originated year three, write offs | 0 | | 0 |
Financing receivable, originated year four, write offs | 0 | | 0 |
Financing receivable, originated year five, write offs | 0 | | 0 |
Financing receivable, originated prior, write offs | 0 | | 0 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | | 0 |
Construction Portfolio Segment [Member] | One to Four Family [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 18,000 |
Financing receivable, originated current year | 0 | | 18,000 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Construction Portfolio Segment [Member] | One to Four Family [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Construction Portfolio Segment [Member] | One to Four Family [Member] | Classified [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 18,000 |
Financing receivable, originated current year | 0 | | 18,000 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | | | |
Loans receivable, before allowance and fee | 624,000 | | 707,000 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 624,000 | | 707,000 |
Financing receivable, originated current year, write offs | 0 | | 0 |
Financing receivable, originated year two, write offs | 0 | | 0 |
Financing receivable, originated year three, write offs | 0 | | 0 |
Financing receivable, originated year four, write offs | 0 | | 0 |
Financing receivable, originated year five, write offs | 0 | | 0 |
Financing receivable, originated prior, write offs | 0 | | 0 |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 624,000 | | 707,000 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 624,000 | | 707,000 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Financing receivable, originated current year | 0 | | 0 |
Financing receivable, originated year two | 0 | | 0 |
Financing receivable, originated year three | 0 | | 0 |
Financing receivable, originated year four | 0 | | 0 |
Financing receivable, originated year five | 0 | | 0 |
Financing receivable, originated prior | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member] | | | |
Loans receivable, before allowance and fee | 624,041 | | 706,651 |
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member] | Pass [Member] | | | |
Loans receivable, before allowance and fee | 624,000 | | 707,000 |
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member] | Special Mention [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member] | Substandard [Member] | | | |
Loans receivable, before allowance and fee | 0 | | 0 |
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member] | Doubtful [Member] | | | |
Loans receivable, before allowance and fee | $ 0 | | $ 0 |