Annual report [Section 13 and 15(d), not S-K Item 405]

Note 1 - Summary of Significant Accounting Policies (Details Textual)

v3.26.1
Note 1 - Summary of Significant Accounting Policies (Details Textual)
12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest Receivable Interest Receivable
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest Receivable Interest Receivable
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss $ 326,000 $ 278,000
Federal Home Loan Bank Stock $ 605,000 585,000
Financing Receivable, Number of Portfolios 5  
Financing Receivable, Accrued Interest, after Allowance for Credit Loss $ 577,000 560,000
Unrecognized Tax Benefits, Ending Balance $ 0 $ 0
Number of Operating Segments 1  
Number of Reportable Segments 1  
Multifamily and Commercial Real Estate [Member] | First Mortgage Loans [Member]    
Financing Receivable, Maximum Term (Year) 30 years  
Financing Receivable, Maximum Loan-to-value Ratio 75.00%  
Construction Loans [Member] | Commercial Portfolio Segment [Member]    
Financing Receivable, Minimum Percentage of Loan-to-value Ratio, Requires Mortgage Insurance 80.00%