Fair Value of Financial Instruments - Carrying amount and fair value of the Corporations other financial instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities - held to maturity, at cost with no allowance for credit losses	$ 147,574	$ 154,337
Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	1,071,109	1,076,317
Investment securities - held to maturity, at cost with no allowance for credit losses	147,574	154,337
FHLB - San Francisco stock	9,505	9,505
Deposits	931,131	950,571
Borrowings	235,009	235,009
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	966,437	970,277
Investment securities - held to maturity, at cost with no allowance for credit losses	126,851	135,541
FHLB - San Francisco stock	9,505	9,505
Deposits	928,497	949,116
Borrowings	232,686	232,764
Fair Value \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	0	0
Investment securities - held to maturity, at cost with no allowance for credit losses	0	0
FHLB - San Francisco stock	0	0
Deposits	0	0
Borrowings	0	0
Fair Value \| Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	0	0
Investment securities - held to maturity, at cost with no allowance for credit losses	126,851	135,541
FHLB - San Francisco stock	9,505	9,505
Deposits	928,497	949,116
Borrowings	232,686	232,764
Fair Value \| Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	966,437	970,277
Investment securities - held to maturity, at cost with no allowance for credit losses	0	0
FHLB - San Francisco stock	0	0
Deposits	0	0
Borrowings	$ 0	$ 0

Loans Held for Investment, Net, Fair Value Disclosure

No definition available.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

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-Topic 470
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-Topic 825
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-Name Accounting Standards Codification
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-Publisher FASB
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- Definition

Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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-Topic 326
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-Topic 326
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-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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- Definition

Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

+ References

No definition available.

+ Details

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