EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($)	3 Months Ended			6 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year	0			0
Employee Stock Ownership Plan (ESOP), Shares in ESOP	255,648			255,648
ESOP loan balance	$ 2,300,000			$ 2,300,000
Debt Instrument, Term				25 years
Pentegra DB Plan [Member]
Defined benefit plan, Service cost	128,000		$ 195,000	$ 315,000	$ 390,000
Defined benefit plan, Contributions by employer	439,000		675,000	439,000	675,000
FourHundredAndOne K Plan [Member]
Defined contribution plan, Employer matching contribution, Percent of employees gross pay		3.00%
Defined benefit plan contributions expense	4,000		5,000	$ 9,000	11,000
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	974,000			$ 974,000		$ 941,000
Pension and other postretirement benefits, Expenses	16,000		32,000	16,000	32,000
Cash surrender value of life insurance	6,200,000			6,200,000		6,100,000
Postretirement Life Insurance [Member] | Split Dollar Agreements [Member]
Cash surrender value of life insurance	4,600,000			4,600,000		$ 4,600,000
Other Postretirement Benefits Plan [Member] | Split Dollar Agreements [Member]
Pension and other postretirement benefits, Expenses	$ 15,000		$ 19,000	$ 25,000	$ 38,000
Tax-Qualified Retirement Plan [Member]
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year	10,226			10,226