Loans Receivable and the Allowance for Loan Losses - Past due (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 76,273,000	$ 75,431,000
Current	76,273,000	75,431,000
Loan balances outstanding on non-accrual status	0	0
Mortgage - 1-4 Family
Financing Receivable, Past Due [Line Items]
Loans receivable	65,686,000	66,356,000
Current	65,686,000	66,356,000
Mortgage - Multifamily
Financing Receivable, Past Due [Line Items]
Loans receivable	2,390,000	2,780,000
Current	2,390,000	2,780,000
Mortgage - Construction and Land
Financing Receivable, Past Due [Line Items]
Loans receivable	6,499,000	4,576,000
Current	6,499,000	4,576,000
Mortgage - Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans receivable	1,468,000	1,480,000
Current	1,468,000	1,480,000
Consumer Loans
Financing Receivable, Past Due [Line Items]
Loans receivable	230,000	239,000
Current	$ 230,000	$ 239,000