Loans Held for Investment - Schedule of Gross Loans Held for Investment by Loan Types and Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022
Total loans held for investment, gross		$ 1,074,164	$ 991,401
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	$ 93,668	77,502
2022	315,078	319,657
2021	253,984	255,094
2020	91,328	92,750
2019	80,495	81,483
Prior	234,681	246,202
Revolving Loans	1,234	1,476
Total	1,070,468	1,074,164
Mortgage loans \| Single-family
Total loans held for investment, gross		518,821	429,575
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	61,583	51,378
2022	213,223	216,989
2021	156,078	157,015
2020	20,841	20,992
2019	11,729	11,793
Prior	58,093	60,622
Revolving Loans	29	32
Total	521,576	518,821
Mortgage loans \| Single-family \| Pass
Total loans held for investment, gross		517,399
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	61,583	51,378
2022	213,223	216,989
2021	156,078	157,015
2020	20,591	20,741
2019	11,729	11,793
Prior	56,862	59,451
Revolving Loans	29	32
Total	520,095
Mortgage loans \| Single-family \| Special Mention
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
Prior	73
Total	73
Mortgage loans \| Single-family \| Substandard
Total loans held for investment, gross		1,422
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2020	250	251
Prior	1,158	1,171
Total	1,408
Mortgage loans \| Multi Family
Total loans held for investment, gross		461,113	468,031
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	22,501	17,429
2022	77,566	77,956
2021	90,915	91,436
2020	63,897	65,127
2019	58,850	59,709
Prior	143,622	149,456
Total	457,351	461,113
Mortgage loans \| Multi Family \| Pass
Total loans held for investment, gross		460,603
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	22,501	17,429
2022	77,566	77,956
2021	90,408	90,926
2020	63,897	65,127
2019	58,850	59,709
Prior	143,622	149,456
Total	456,844
Mortgage loans \| Multi Family \| Special Mention
Total loans held for investment, gross		510
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2021	507	510
Total	507
Mortgage loans \| Commercial real estate
Total loans held for investment, gross		90,558	89,339
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	9,407	8,586
2022	23,690	23,815
2021	5,489	5,527
2020	6,486	6,525
2019	9,916	9,981
Prior	32,966	36,124
Total	87,954	90,558
Mortgage loans \| Commercial real estate \| Pass
Total loans held for investment, gross		90,011
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	9,407	8,586
2022	23,690	23,815
2021	5,489	5,527
2020	6,486	6,525
2019	9,916	9,981
Prior	32,420	35,577
Total	87,408
Mortgage loans \| Commercial real estate \| Substandard
Total loans held for investment, gross		547
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
Prior	546	547
Total	546
Mortgage loans \| Construction
Total loans held for investment, gross		1,936	3,151
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	160	94
2022	438	726
2021	1,502	1,116
Total	2,100	1,936
Mortgage loans \| Construction \| Pass
Total loans held for investment, gross		1,936
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	160	94
2022	438	726
2021	1,502	1,116
Total	2,100
Mortgage loans \| Other
Total loans held for investment, gross		106	118
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2020	104	106
Total	104	106
Mortgage loans \| Other \| Pass
Total loans held for investment, gross		106
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2020	104	106
Total	104
Commercial business loans
Total loans held for investment, gross		1,565	1,117
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2022	161	171
Revolving Loans	1,160	1,394
Total	1,321	1,565
Commercial business loans \| Pass
Total loans held for investment, gross		1,565
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2022	161	171
Revolving Loans	1,160	1,394
Total	1,321
Consumer loans
Total loans held for investment, gross		65	$ 70
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	17	15
Revolving Loans	45	50
Total	62	65
Consumer loans \| Not graded
Total loans held for investment, gross		15
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
2023	17	15
Total	17
Consumer loans \| Pass
Total loans held for investment, gross		50
Investment in loans by risk categories by year of origination (Post Adoption of ASU 2016-13)
Revolving Loans	45	$ 50
Total	$ 45

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