Quarterly report [Sections 13 or 15(d)]

Note 3 - Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio (Details)

v3.26.1
Note 3 - Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Loan, current $ 3,216   $ 18,939
Loan, one year before 17,762   15,826
Loan, two years before 14,193   16,724
Loan, three years before 16,269   10,910
Loan, four years before 10,755   16,750
Loan, prior 58,536   43,139
Loan, revolving 7,754   7,176
Loan, revolving converted to term loans 0   0
Loans 128,485   129,464
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 $ 0 0
Pass [Member]      
Loan, current 3,216   18,939
Loan, one year before 17,762   15,564
Loan, two years before 13,931   16,724
Loan, three years before 14,828   10,910
Loan, four years before 10,755   16,750
Loan, prior 58,515   43,117
Loan, revolving 7,754   7,176
Loan, revolving converted to term loans 0   0
Loans 126,761   129,180
Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 1,441   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 1,441   0
Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   262
Loan, two years before 262   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 21   22
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 283   284
First Mortgage Loans [Member]      
Loans 128,163   129,196
First Mortgage Loans [Member] | One To Four Family Residential [Member]      
Loan, current 2,581   16,653
Loan, one year before 14,994   13,597
Loan, two years before 12,688   16,423
Loan, three years before 15,981   10,870
Loan, four years before 10,720   16,434
Loan, prior 52,968   37,791
Loan, revolving 6,982   6,454
Loan, revolving converted to term loans 0   0
Loans 116,914   118,222
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 0 0
First Mortgage Loans [Member] | One To Four Family Residential [Member] | Pass [Member]      
Loan, current 2,581   16,653
Loan, one year before 14,994   13,335
Loan, two years before 12,426   16,423
Loan, three years before 14,540   10,870
Loan, four years before 10,720   16,434
Loan, prior 52,947   37,769
Loan, revolving 6,982   6,454
Loan, revolving converted to term loans 0   0
Loans 115,190   117,938
First Mortgage Loans [Member] | One To Four Family Residential [Member] | Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 1,441   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 1,441   0
First Mortgage Loans [Member] | One To Four Family Residential [Member] | Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   262
Loan, two years before 262   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 21   22
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 283   284
First Mortgage Loans [Member] | Multifamily [Member]      
Loan, current 220   0
Loan, one year before 0   507
Loan, two years before 504   0
Loan, three years before 0   0
Loan, four years before 0   221
Loan, prior 2,701   2,512
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 3,425   3,240
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 0 0
First Mortgage Loans [Member] | Multifamily [Member] | Pass [Member]      
Loan, current 220   0
Loan, one year before 0   507
Loan, two years before 504   0
Loan, three years before 0   0
Loan, four years before 0   221
Loan, prior 2,701   2,512
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 3,425   3,240
First Mortgage Loans [Member] | Multifamily [Member] | Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
First Mortgage Loans [Member] | Multifamily [Member] | Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
First Mortgage Loans [Member] | Commercial Real Estate [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   165
Loan, three years before 162   0
Loan, four years before 0   92
Loan, prior 2,863   2,834
Loan, revolving 772   722
Loan, revolving converted to term loans 0   0
Loans 3,797   3,813
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 0 0
First Mortgage Loans [Member] | Commercial Real Estate [Member] | Pass [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   165
Loan, three years before 162   0
Loan, four years before 0   92
Loan, prior 2,863   2,834
Loan, revolving 772   722
Loan, revolving converted to term loans 0   0
Loans 3,797   3,813
First Mortgage Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
First Mortgage Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
First Mortgage Loans [Member] | Construction Loans [Member]      
Loan, current 332   2,156
Loan, one year before 2,646   1,676
Loan, two years before 963   89
Loan, three years before 86   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 4,027   3,921
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 0 0
First Mortgage Loans [Member] | Construction Loans [Member] | Pass [Member]      
Loan, current 332   2,156
Loan, one year before 2,646   1,676
Loan, two years before 963   89
Loan, three years before 86   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 4,027   3,921
First Mortgage Loans [Member] | Construction Loans [Member] | Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
First Mortgage Loans [Member] | Construction Loans [Member] | Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
Consumer Portfolio Segment [Member]      
Loan, current 83   130
Loan, one year before 122   46
Loan, two years before 38   47
Loan, three years before 40   40
Loan, four years before 35   3
Loan, prior 4   2
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 322   268
Current year-to-date gross write-offs 0   0
Current year-to-date gross write-offs, one year before 0   0
Current year-to-date gross write-offs, two years before 0   0
Current year-to-date gross write-offs, three years before 0   0
Current year-to-date gross write-offs, four years before 0   0
Current year-to-date gross write-offs, prior 0   0
Current year-to-date gross write-offs, revolving 0   0
Current year-to-date gross write-offs, revolving converted to term loans 0   0
Charge-offs 0 $ 0 0
Consumer Portfolio Segment [Member] | Pass [Member]      
Loan, current 83   130
Loan, one year before 122   46
Loan, two years before 38   47
Loan, three years before 40   40
Loan, four years before 35   3
Loan, prior 4   2
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 322   268
Consumer Portfolio Segment [Member] | Special Mention [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans 0   0
Consumer Portfolio Segment [Member] | Substandard [Member]      
Loan, current 0   0
Loan, one year before 0   0
Loan, two years before 0   0
Loan, three years before 0   0
Loan, four years before 0   0
Loan, prior 0   0
Loan, revolving 0   0
Loan, revolving converted to term loans 0   0
Loans $ 0   $ 0