Fair Value of Financial Instruments - Corporations assets measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment, at fair value	$ 1,010	$ 1,018
Other equity investments, at fair value	702	730
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	1,544	1,607
Loans held for investment, at fair value	1,010	1,018
Other equity investments, at fair value	702	730
Interest-only strips	5	6
Total assets	3,261	3,361
Liabilities	0	0
Total liabilities	0	0
Recurring \| U.S. government agency MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	1,038	1,082
Recurring \| U.S. government sponsored enterprise MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	431	446
Recurring \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	75	79
Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Loans held for investment, at fair value	0	0
Other equity investments, at fair value	0	0
Interest-only strips	0	0
Total assets	0	0
Liabilities	0	0
Total liabilities	0	0
Recurring \| Level 1 \| U.S. government agency MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 1 \| U.S. government sponsored enterprise MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 1 \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	1,469	1,528
Loans held for investment, at fair value	0	0
Other equity investments, at fair value	702	730
Interest-only strips	0	0
Total assets	2,171	2,258
Liabilities	0	0
Total liabilities	0	0
Recurring \| Level 2 \| U.S. government agency MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	1,038	1,082
Recurring \| Level 2 \| U.S. government sponsored enterprise MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	431	446
Recurring \| Level 2 \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	75	79
Loans held for investment, at fair value	1,010	1,018
Other equity investments, at fair value	0	0
Interest-only strips	5	6
Total assets	1,090	1,103
Liabilities	0	0
Total liabilities	0	0
Recurring \| Level 3 \| U.S. government agency MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 3 \| U.S. government sponsored enterprise MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	0	0
Recurring \| Level 3 \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	$ 75	$ 79

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