Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Summary of Significant Accounting Policies - Impact of Adoption of ASU (Details)

v3.23.2
Note 1 - Summary of Significant Accounting Policies - Impact of Adoption of ASU (Details) - USD ($)
Jun. 30, 2023
Mar. 31, 2023
Jan. 01, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Allowance for credit losses for all loans $ 1,010,000 $ 979,000 $ 624,000 $ 624,000 $ 769,000 $ 785,000 $ 779,000
Allowance for credit losses on off-balance sheet exposures 5,000   0        
First Mortgage Loans [Member] | One To Four Family Residential [Member]              
Allowance for credit losses for all loans 928,000 890,000 581,000 581,000 713,000 729,000 675,000
First Mortgage Loans [Member] | Multifamily [Member]              
Allowance for credit losses for all loans 41,000 41,000 19,000 19,000 26,000 27,000 69,000
First Mortgage Loans [Member] | Commercial Real Estate [Member]              
Allowance for credit losses for all loans 39,000 46,000 19,000 19,000 26,000 26,000 25,000
Consumer Portfolio Segment [Member]              
Allowance for credit losses for all loans $ 2,000 $ 2,000 5,000 5,000 $ 4,000 $ 3,000 $ 10,000
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]              
Allowance for credit losses for all loans     1,008,000        
Allowance for credit losses on off-balance sheet exposures     5,000        
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member]              
Allowance for credit losses for all loans     916,000        
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | Multifamily [Member]              
Allowance for credit losses for all loans     42,000        
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member]              
Allowance for credit losses for all loans     48,000        
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | Consumer Portfolio Segment [Member]              
Allowance for credit losses for all loans     2,000        
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]              
Allowance for credit losses for all loans     384,000 384,000      
Allowance for credit losses on off-balance sheet exposures     5,000        
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | One To Four Family Residential [Member]              
Allowance for credit losses for all loans     335,000 335,000      
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | Multifamily [Member]              
Allowance for credit losses for all loans     23,000 23,000      
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | First Mortgage Loans [Member] | Commercial Real Estate [Member]              
Allowance for credit losses for all loans     29,000 29,000      
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Consumer Portfolio Segment [Member]              
Allowance for credit losses for all loans     $ (3,000) $ (3,000)