Loans Held for Investment - Schedule of Gross Loans Held for Investment by Loan Types and Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Loans and Leases Receivable, Gross	$ 991,401	$ 937,970
Mortgage loans, Single-family
Loans and Leases Receivable, Gross	429,575	378,234
Mortgage Loans, Multi Family
Loans and Leases Receivable, Gross	468,031	464,676
Mortgage loans, Commercial real estate
Loans and Leases Receivable, Gross	89,339	90,429
Construction
Loans and Leases Receivable, Gross	3,151	3,216
Mortgage Loans Other
Loans and Leases Receivable, Gross	118	123
Commercial business loans
Loans and Leases Receivable, Gross	1,117	1,206
Consumer loans
Loans and Leases Receivable, Gross	70	86
Pass
Loans and Leases Receivable, Gross	990,353	936,238
Pass | Mortgage loans, Single-family
Loans and Leases Receivable, Gross	428,527	376,502
Pass | Mortgage Loans, Multi Family
Loans and Leases Receivable, Gross	468,031	464,676
Pass | Mortgage loans, Commercial real estate
Loans and Leases Receivable, Gross	89,339	90,429
Pass | Construction
Loans and Leases Receivable, Gross	3,151	3,216
Pass | Mortgage Loans Other
Loans and Leases Receivable, Gross	118	123
Pass | Commercial business loans
Loans and Leases Receivable, Gross	1,117	1,206
Pass | Consumer loans
Loans and Leases Receivable, Gross	70	86
Special Mention
Loans and Leases Receivable, Gross		224
Special Mention | Mortgage loans, Single-family
Loans and Leases Receivable, Gross		224
Special Mention | Mortgage Loans, Multi Family
Loans and Leases Receivable, Gross		0
Special Mention | Mortgage loans, Commercial real estate
Loans and Leases Receivable, Gross		0
Special Mention | Construction
Loans and Leases Receivable, Gross		0
Special Mention | Mortgage Loans Other
Loans and Leases Receivable, Gross		0
Special Mention | Commercial business loans
Loans and Leases Receivable, Gross		0
Special Mention | Consumer loans
Loans and Leases Receivable, Gross		0
Substandard
Loans and Leases Receivable, Gross	1,048	1,508
Substandard | Mortgage loans, Single-family
Loans and Leases Receivable, Gross	1,048	1,508
Substandard | Mortgage Loans, Multi Family
Loans and Leases Receivable, Gross	0	0
Substandard | Mortgage loans, Commercial real estate
Loans and Leases Receivable, Gross	0	0
Substandard | Construction
Loans and Leases Receivable, Gross	0	0
Substandard | Mortgage Loans Other
Loans and Leases Receivable, Gross	0	0
Substandard | Commercial business loans
Loans and Leases Receivable, Gross	0	0
Substandard | Consumer loans
Loans and Leases Receivable, Gross	$ 0	$ 0