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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year	255,648		255,648
ESOP loan balance	$ 2,500,000		$ 2,500,000
Debt Instrument, Term			25 years
Pentegra DB Plan [Member]
Defined benefit plan, Service cost	130,000	$ 180,000	$ 325,000	$ 375,000
Defined benefit plan, Contributions by employer	675,000	715,000	$ 675,000	715,000
FourHundredAndOne K Plan [Member]
Defined contribution plan, Employer matching contribution, Percent of employees gross pay			3.00%
Defined contribution plan, Employer discretionary contribution amount	4,000	9,000	$ 10,000	20,000
FourHundredAndOne K Plan [Member] | Maximum [Member]
Defined contribution plan, Voluntary contributions by Employees, Percent			15.00%
Defined contribution plan, Employer matching contribution, Percent of match			10.00%
FourHundredAndOne K Plan [Member] | Minimum [Member]
Defined contribution plan, Voluntary contributions by Employees, Percent			2.00%
Supplemental Employee Retirement Plan [Member]
Liability, Defined benefit plan	845,000		$ 845,000		$ 814,000
Pension and other postretirement benefits, Expenses	16,000	19,000	31,000	35,000
Postretirement Life Insurance [Member] | Split Dollar Agreements [Member]
Pension and other postretirement benefits, Expenses	29,000	$ 14,000	58,000	$ 27,000
Cash surrender value of life insurance	4,500,000		4,500,000		4,400,000
Postretirement Life Insurance In Connection With SERPs [Member]
Cash surrender value of life insurance	$ 5,800,000		$ 5,800,000		$ 5,700,000
Tax-Qualified Retirement Plan [Member]
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year	10,226		10,226

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Defined contribution plan, voluntary contributions by employees, percent.

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount reported as a liability as of the balance sheet date by the entity (the employer) of the loan made by a third-party lender directly to the ESOP.

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