Loans Held for Investment - Schedule of Allowance For Loan Losses and Recorded Investment in Gross Loans, by Portfolio Type (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 7,587	$ 8,265
(Recovery) provision for loan losses	(2,462)	(708)
Recoveries	439	32
Charge-offs	0	(2)
Allowance for loan losses, end of the year	5,564	7,587
Individually evaluated for allowances	38	384
Collectively evaluated for allowances	5,526	7,203
Individually evaluated for allowances	1,275	8,039
Collectively evaluated for allowances	936,695	844,043
Total Loans Held for Investment, Gross	$ 937,970	$ 852,082
Allowance for loan losses as a percentage of gross loans held for investment	0.59%	0.88%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	(0.05%)	0.00%
Mortgage loans, Single-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 2,000	$ 2,622
(Recovery) provision for loan losses	(1,056)	(653)
Recoveries	439	31
Charge-offs	0
Allowance for loan losses, end of the year	1,383	2,000
Individually evaluated for allowances	38	384
Collectively evaluated for allowances	1,345	1,616
Individually evaluated for allowances	1,275	8,039
Collectively evaluated for allowances	376,959	260,233
Total Loans Held for Investment, Gross	$ 378,234	$ 268,272
Allowance for loan losses as a percentage of gross loans held for investment	0.37%	0.75%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	(0.15%)	(0.01%)
Mortgage Loans, Multi Family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 4,485	$ 4,329
(Recovery) provision for loan losses	(1,203)	156
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of the year	3,282	4,485
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	3,282	4,485
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	464,676	484,408
Total Loans Held for Investment, Gross	$ 464,676	$ 484,408
Allowance for loan losses as a percentage of gross loans held for investment	0.71%	0.93%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	0.00%
Mortgage loans, Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 1,006	$ 1,110
(Recovery) provision for loan losses	(190)	(104)
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of the year	816	1,006
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	816	1,006
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	90,429	95,279
Total Loans Held for Investment, Gross	$ 90,429	$ 95,279
Allowance for loan losses as a percentage of gross loans held for investment	0.90%	1.06%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	0.00%
Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 51	$ 171
(Recovery) provision for loan losses	(28)	(120)
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of the year	23	51
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	23	51
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	3,216	3,040
Total Loans Held for Investment, Gross	$ 3,216	$ 3,040
Allowance for loan losses as a percentage of gross loans held for investment	0.72%	1.68%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	0.00%
Mortgage Loans Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 3	$ 3
(Recovery) provision for loan losses	0	0
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of the year	3	3
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	3	3
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	123	139
Total Loans Held for Investment, Gross	$ 123	$ 139
Allowance for loan losses as a percentage of gross loans held for investment	2.44%	2.16%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	0.00%
Commercial business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 36	$ 24
(Recovery) provision for loan losses	16	12
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of the year	52	36
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	52	36
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	1,206	849
Total Loans Held for Investment, Gross	$ 1,206	$ 849
Allowance for loan losses as a percentage of gross loans held for investment	4.31%	4.24%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	0.00%
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of the year	$ 6	$ 6
(Recovery) provision for loan losses	(1)	1
Recoveries	0	1
Charge-offs	0	(2)
Allowance for loan losses, end of the year	5	6
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	5	6
Individually evaluated for allowances	0	0
Collectively evaluated for allowances	86	95
Total Loans Held for Investment, Gross	$ 86	$ 95
Allowance for loan losses as a percentage of gross loans held for investment	5.81%	6.32%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period	0.00%	1.22%

Represents amount of allowance for loan losses as a percentage of gross loans-held for investment.

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Loans Held For Investment, Gross

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Net charge-offs (recoveries) as a percentage of average loans receivable, net, during the period (annualized).

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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