Fair Value of Financial Instruments - Corporation's assets measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment, at fair value	$ 1,874	$ 2,258
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	3,587	4,717
Loans held for investment, at fair value	1,874	2,258
Interest-only strips	10	14
Total assets	5,471	6,989
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	2,222	2,943
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	1,211	1,577
Recurring \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	154	197
Recurring \| Fair Value, Inputs, 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
Interest-only strips	0	0
Total assets	0	0
Liabilities	0	0
Total liabilities	0	0
Recurring \| Fair Value, Inputs, 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 \| Fair Value, Inputs, 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 \| Fair Value, Inputs, 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 \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	3,433	4,520
Loans held for investment, at fair value	0	0
Interest-only strips	0	0
Total assets	3,433	4,520
Liabilities	0	0
Total liabilities	0	0
Recurring \| Fair Value, Inputs, 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	2,222	2,943
Recurring \| Fair Value, Inputs, 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	1,211	1,577
Recurring \| Fair Value, Inputs, 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 \| Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	154	197
Loans held for investment, at fair value	1,874	2,258
Interest-only strips	10	14
Total assets	2,038	2,469
Liabilities	0	0
Total liabilities	0	0
Recurring \| Fair Value, Inputs, 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 \| Fair Value, Inputs, 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 \| Fair Value, Inputs, Level 3 \| Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - available for sale	$ 154	$ 197

Loans Held for Investment, at Fair Value

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- Definition

Loans Receivable, Interest Income, Fair Value Disclosure

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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+ References

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- Definition

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

+ References

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Fair value of financial and nonfinancial obligations.

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