Loan Portfolio and Allowance for Credit Losses - Amortized Cost of Collateral-dependent Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Real Estate [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	$ 26,402	$ 25,739
Real Estate [Member] | Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Investment Securities/Cash [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Investment Securities/Cash [Member] | Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Other [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	46	29
Other [Member] | Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	39	22
Commercial Real Estate [Member] | Real Estate [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	2,052	2,076
Commercial Real Estate [Member] | Investment Securities/Cash [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Commercial Real Estate [Member] | Other [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Other [Member] | Real Estate [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Other [Member] | Investment Securities/Cash [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Other [Member] | Other [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	7	7
First Mortgages [Member] | Real Estate [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	21,235	20,591
First Mortgages [Member] | Investment Securities/Cash [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
First Mortgages [Member] | Other [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Home Equity Loans [Member] | Real Estate [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	501	511
Home Equity Loans [Member] | Investment Securities/Cash [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Home Equity Loans [Member] | Other [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Home Equity Lines of Credit [Member] | Real Estate [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	2,614	2,561
Home Equity Lines of Credit [Member] | Investment Securities/Cash [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	0	0
Home Equity Lines of Credit [Member] | Other [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total loans, net	$ 0	$ 0