Loans Receivable Held for Investment, Aging of Recorded Investment in Past Due Loans by Loan Type (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	$ 84	$ 18
Current	364,924	401,011
Gross loans receivable	365,008	401,029
30-59 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	76	18
60-89 Days Past Due [Member]
Aging of Recorded Investment in Past Due Loans by Loan Type [Abstract]
Total Past Due	8	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	84	18
Current	54,050	73,094
Gross loans receivable	54,134	73,112
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	76	18
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	8	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	271,375	289,043
Gross loans receivable	271,375	289,043
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	20,086	14,818
Gross loans receivable	20,086	14,818
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	17,431	20,648
Gross loans receivable	17,431	20,648
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	1,672	3,125
Gross loans receivable	1,672	3,125
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	302	262
Gross loans receivable	302	262
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	8	21
Gross loans receivable	8	21
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