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Disclosures About Fair Value of Assets and Liabilities - Estimated Fair Values of Financial Instruments and Level within Fair Value Hierarchy in which Fair Value Measurements Fall (Detail) - USD ($) | Mar. 31, 2023 | Jun. 30, 2022
--- | --- | ---
Financial assets |  |
Cash and cash equivalents | $ 9,465,000 | $ 75,811,000
Interest-bearing time deposits in banks | 1,250,000 | 1,500,000
Loans, net of allowance for loan losses | 578,511,000 | 518,931,000
Federal Home Loan Bank stock | 3,843,000 | 3,142,000
Accrued interest receivable | 2,641,000 | 2,023,000
Financial liabilities |  |
Deposits | 691,568,000 | 752,020,000
Repurchase agreements | 10,764,000 | 9,244,000
Federal Home Loan Bank advances | 56,500,000 | 15,000,000
Advances from borrowers for taxes and insurance | 1,352,000 | 503,000
Accrued interest payable | 961,000 | 176,000
Unrecognized financial instruments (net of contract amount) |  |
Commitments to originate loans | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Financial assets |  |
Cash and cash equivalents | 9,465,000 | 75,811,000
Interest-bearing time deposits in banks | 1,250,000 | 1,500,000
Unrecognized financial instruments (net of contract amount) |  |
Commitments to originate loans | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |
Financial assets |  |
Federal Home Loan Bank stock | 3,843,000 | 3,142,000
Accrued interest receivable | 2,641,000 | 2,023,000
Financial liabilities |  |
Deposits | 404,660,000 | 501,544,000
Repurchase agreements | 10,764,000 | 9,244,000
Federal Home Loan Bank advances | 56,360,000 | 14,903,000
Advances from borrowers for taxes and insurance | 1,352,000 | 503,000
Accrued interest payable | 961,000 | 176,000
Unrecognized financial instruments (net of contract amount) |  |
Commitments to originate loans | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] |  |
Financial assets |  |
Loans, net of allowance for loan losses | 555,882,000 | 512,643,000
Financial liabilities |  |
Deposits | 284,542,000 | 250,650,000
Unrecognized financial instruments (net of contract amount) |  |
Commitments to originate loans | $ 0 | $ 0

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- Definition Carrying amount of accumulated prepayments received by financial institutions from borrowers for taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the appropriate governmental agency or vendor on behalf of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123599499&loc=d3e63345-112809 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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