Loans Held for Investment - Schedule of Allowance For Credit Losses and Recorded Investment in Gross Loans, by Portfolio Type (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	$ 5,946	$ 5,564
ACL, beginning of period	5,946	5,564
Provision for (reversal of) credit losses	(78)
(Recovery of) provision for credit losses		374
Recoveries		8
ACL, end of period		5,946
ACL, end of period	7,065	5,946
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	5,946	5,564
Provision for (reversal of) credit losses	(78)
ACL, end of period	7,065	5,946
Allowance for credit losses: Individually evaluated for impairment	37	37
Allowance for credit losses: Collectively evaluated for impairment	7,028	5,909
Loans held for investment: Individually evaluated for allowances	1,134	996
Loans held for investment: Collectively evaluated for allowances	1,049,712	1,073,168
Total loans held for investment, gross		$ 1,074,164
Total loans held for investment, gross	$ 1,050,846
ACL as a percentage of gross loans held for investment	0.67%	0.55%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period		0.00%
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ 1,197
ACL, end of period		$ 1,197
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	1,197
ACL, end of period		1,197
Single-family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total loans held for investment, gross		518,821
Multi Family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total loans held for investment, gross		461,113
Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total loans held for investment, gross		1,936
Other
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total loans held for investment, gross		106
Mortgage loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total loans held for investment, gross		90,558
Total loans held for investment, gross	83,349
Mortgage loans \| Single-family
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	1,720	1,383
ACL, beginning of period	1,720
Provision for (reversal of) credit losses	(30)
(Recovery of) provision for credit losses		329
Recoveries		8
ACL, end of period		1,720
ACL, end of period	6,295	1,720
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	1,720
Provision for (reversal of) credit losses	(30)
ACL, end of period	6,295	1,720
Allowance for credit losses: Individually evaluated for impairment	37	37
Allowance for credit losses: Collectively evaluated for impairment	6,258	1,683
Loans held for investment: Individually evaluated for allowances	1,134	996
Loans held for investment: Collectively evaluated for allowances	516,957	517,825
Total loans held for investment, gross		$ 518,821
Total loans held for investment, gross	$ 518,091
ACL as a percentage of gross loans held for investment	1.22%	0.33%
Net (recoveries) charge-offs as a percentage of average loans receivable, net, during the period		0.00%
Mortgage loans \| Single-family \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ 4,605
ACL, end of period		$ 4,605
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	4,605
ACL, end of period		4,605
Mortgage loans \| Multi Family
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	3,270	3,282
ACL, beginning of period	3,270
Provision for (reversal of) credit losses	(61)
(Recovery of) provision for credit losses		(12)
ACL, end of period		3,270
ACL, end of period	595	3,270
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	3,270
Provision for (reversal of) credit losses	(61)
ACL, end of period	595	3,270
Allowance for credit losses: Collectively evaluated for impairment	595	3,270
Loans held for investment: Collectively evaluated for allowances	445,182	461,113
Total loans held for investment, gross		$ 461,113
Total loans held for investment, gross	$ 445,182
ACL as a percentage of gross loans held for investment	0.13%	0.71%
Mortgage loans \| Multi Family \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ (2,614)
ACL, end of period		$ (2,614)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	(2,614)
ACL, end of period		(2,614)
Mortgage loans \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	868	816
ACL, beginning of period	868
Provision for (reversal of) credit losses	(16)
(Recovery of) provision for credit losses		52
ACL, end of period		868
ACL, end of period	66	868
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	868
Provision for (reversal of) credit losses	(16)
ACL, end of period	66	868
Allowance for credit losses: Collectively evaluated for impairment	66	868
Loans held for investment: Collectively evaluated for allowances	83,349	90,558
Total loans held for investment, gross		$ 90,558
Total loans held for investment, gross	$ 83,349
ACL as a percentage of gross loans held for investment	0.08%	0.96%
Mortgage loans \| Commercial real estate \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ (786)
ACL, end of period		$ (786)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	(786)
ACL, end of period		(786)
Mortgage loans \| Construction Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	15	23
ACL, beginning of period	15
Provision for (reversal of) credit losses	35
(Recovery of) provision for credit losses		(8)
ACL, end of period		15
ACL, end of period	97	15
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	15
Provision for (reversal of) credit losses	35
ACL, end of period	97	15
Allowance for credit losses: Collectively evaluated for impairment	97	15
Loans held for investment: Collectively evaluated for allowances	2,692	1,936
Total loans held for investment, gross		$ 1,936
Total loans held for investment, gross	$ 2,692
ACL as a percentage of gross loans held for investment	3.60%	0.77%
Mortgage loans \| Construction Loans [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ 47
ACL, end of period		$ 47
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	47
ACL, end of period		47
Mortgage loans \| Other
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	2	3
ACL, beginning of period	2
Provision for (reversal of) credit losses	(4)
(Recovery of) provision for credit losses		(1)
ACL, end of period		2
ACL, end of period	1	2
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	2
Provision for (reversal of) credit losses	(4)
ACL, end of period	1	2
Allowance for credit losses: Collectively evaluated for impairment	1	2
Loans held for investment: Collectively evaluated for allowances	95	106
Total loans held for investment, gross		$ 106
Total loans held for investment, gross	$ 95
ACL as a percentage of gross loans held for investment	1.05%	1.89%
Mortgage loans \| Other \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ 3
ACL, end of period		$ 3
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	3
ACL, end of period		3
Commercial business loans
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	67	52
ACL, beginning of period	67
Provision for (reversal of) credit losses	(2)
(Recovery of) provision for credit losses		15
ACL, end of period		67
ACL, end of period	11	67
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	67
Provision for (reversal of) credit losses	(2)
ACL, end of period	11	67
Allowance for credit losses: Collectively evaluated for impairment	11	67
Loans held for investment: Collectively evaluated for allowances	1,372	1,565
Total loans held for investment, gross		$ 1,565
Total loans held for investment, gross	$ 1,372
ACL as a percentage of gross loans held for investment	0.80%	4.28%
Commercial business loans \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	$ (54)
ACL, end of period		$ (54)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	(54)
ACL, end of period		(54)
Consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of the period	4	5
ACL, beginning of period	4
(Recovery of) provision for credit losses		(1)
ACL, end of period		4
ACL, end of period		4
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	4
ACL, end of period		4
Allowance for credit losses: Collectively evaluated for impairment		4
Loans held for investment: Collectively evaluated for allowances	65	65
Total loans held for investment, gross		$ 65
Total loans held for investment, gross	65
ACL as a percentage of gross loans held for investment		6.15%
Consumer loans \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
ACL, beginning of period	(4)
ACL, end of period		$ (4)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
ACL, beginning of period	$ (4)
ACL, end of period		$ (4)

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

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- Definition

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 excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis.

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Amount of allowance for credit loss on financing receivable evaluated on individual basis. Excludes financing receivable evaluated on collective basis.

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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

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Amount of financing receivable individually evaluated for credit loss. Excludes financing receivable collectively evaluated for credit loss.

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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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