Loans Receivable and the Allowance for Loan Losses - Nonaccrual status (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 89,000	$ 89,000
Current	73,959,000	78,395,000
Total Loans Receivable	74,048,000	78,484,000
Loan balances outstanding on non-accrual status	0	0
Mortgage - 1-4 Family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	89,000	89,000
Current	69,443,000	73,502,000
Total Loans Receivable	69,532,000	73,591,000
Mortgage - Multifamily
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	3,215,000	3,567,000
Total Loans Receivable	3,215,000	3,567,000
Mortgage - Commercial real estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	1,095,000	1,117,000
Total Loans Receivable	1,095,000	1,117,000
Consumer Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	206,000	209,000
Total Loans Receivable	206,000	209,000
60-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	89,000	89,000
60-89 Days Past Due | Mortgage - 1-4 Family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 89,000	$ 89,000