v3.26.1
Note 4 - Loans, Allowance for Credit Losses and Credit Quality - Schedule of Nonaccrual Loans (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Total nonaccrual loans, with allowance for credit loss $ 0   $ 0
Total nonaccrual loans, without allowance for credit loss 1,230,000   1,139,000
Total loans, nonaccrual 1,230,000   1,139,000
Interest Income recognized 16,000 $ 39,000 99,000
Real Estate Portfolio Segment [Member] | One-to-four Family Residential Loan [Member]      
Total nonaccrual loans, with allowance for credit loss 0   0
Total nonaccrual loans, without allowance for credit loss 1,090,000   1,096,000
Total loans, nonaccrual 1,090,000   1,096,000
Interest Income recognized 15,000   74,000
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]      
Total nonaccrual loans, with allowance for credit loss 0   0
Total nonaccrual loans, without allowance for credit loss 140,000   43,000
Total loans, nonaccrual 140,000   43,000
Interest Income recognized $ 1,000   $ 25,000