Loans Receivable Held for Investment, Aging of Recorded Investment in Past Due Loans by Loan Type (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	$ 0	$ 0
Current	365,735	363,344
Gross loans receivable	365,735	363,344
30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Single Family [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	44,537	48,357
Gross loans receivable	44,537	48,357
Real Estate [Member] | Single Family [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Single Family [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Single Family [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	281,046	273,864
Gross loans receivable	281,046	273,864
Real Estate [Member] | Multi-Family [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Multi-Family [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	24,164	24,322
Gross loans receivable	24,164	24,322
Real Estate [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Commercial Real Estate [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	15,458	16,308
Gross loans receivable	15,458	16,308
Real Estate [Member] | Church [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Church [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	469	430
Gross loans receivable	469	430
Real Estate [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Real Estate [Member] | Construction [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	54	56
Gross loans receivable	54	56
Commercial - Other [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Commercial - Other [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Current	7	7
Gross loans receivable	7	7
Consumer [Member] | 30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member] | 60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	0	0
Consumer [Member] | Greater than 90 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	$ 0	$ 0