Fair Value of Financial Instruments - Carrying amount and fair value of the Corporations other financial instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	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	$ 130,051	$ 154,337
Carrying Reported Amount Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	1,051,932	1,076,317
Investment securities - held to maturity, at cost with no allowance for credit losses	130,051	154,337
FHLB - San Francisco stock	9,568	9,505
Deposits	888,348	950,571
Borrowings	238,500	235,009
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	973,453	970,277
Investment securities - held to maturity, at cost with no allowance for credit losses	114,393	135,541
FHLB - San Francisco stock	9,568	9,505
Deposits	888,527	949,116
Borrowings	237,691	232,764
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
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
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
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	114,393	135,541
FHLB - San Francisco stock	9,568	9,505
Deposits	888,527	949,116
Borrowings	237,691	232,764
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, not recorded at fair value	973,453	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

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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/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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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
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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

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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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- Definition

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

+ References

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