Loans Held for Investment - Schedule of Past Due Status of Loans Held for Investment, Gross (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Performing	$ 1,408	$ 1,422
Total loans held for investment, gross	1,070,468	1,074,164
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	1,068,986	1,072,741
30 to 89 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	74	1
Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	1,321	1,565
Commercial business loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	1,321	1,565
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	62	65
Consumer loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	61	64
Consumer loans \| 30 to 89 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	1	1
Single-family \| Mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Performing	1,408	1,422
Total loans held for investment, gross	521,576	518,821
Single-family \| Mortgage loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	520,095	517,399
Single-family \| Mortgage loans \| 30 to 89 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	73
Multi Family \| Mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	457,351	461,113
Multi Family \| Mortgage loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	457,351	461,113
Commercial real estate \| Mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	87,954	90,558
Commercial real estate \| Mortgage loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	87,954	90,558
Construction \| Mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	2,100	1,936
Construction \| Mortgage loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	2,100	1,936
Other \| Mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	104	106
Other \| Mortgage loans \| Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment, gross	$ 104	$ 106

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481598/310-20-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-80

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