INVESTMENT SECURITIES - Amortized Cost and Estimated Fair Value (Details) - USD ($)	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Securities available for sale
Amortized Cost	$ 324,731,000	$ 261,110,000
Gross Unrealized Gains	214,000	311,000		$ 320,000
Gross Unrealized Losses	(3,408,000)	(4,012,000)		(18,870,000)
Estimated Fair Value	321,537,000	257,409,000
Amortized Cost				450,217,000
Estimated Fair Value				431,667,000
Securities held to maturity:
Amortized cost	25,616,000	25,352,000
Gross Unrealized Gains	59,000	55,000
Gross Unrealized Losses	(3,218,000)	(2,970,000)		(2,205,000)
Estimated Fair Value	22,457,000	22,437,000		21,744,000
Allowance for Credit Losses	216,000	262,000	$ 238,000
Net Carrying Value	25,400,000	25,090,000
Amortized cost				23,949,000
Net Carrying Value				23,949,000
Accrued interest receivable on available-for-sale debt securities	1,300,000	1,400,000
Allowance for credit losses for securities available for sale	0	0
Accrued interest receivable on held-to-maturity debt securities	254,000	220,000
Held to maturity securities, 30 days or more past due	0	0
U.S. Treasury
Securities available for sale
Amortized Cost	217,412,000	247,479,000
Gross Unrealized Gains	162,000	1,000		2,000
Gross Unrealized Losses	(868,000)	(3,931,000)		(18,737,000)
Estimated Fair Value	216,706,000	243,549,000
Amortized Cost				396,464,000
Estimated Fair Value				377,729,000
Mortgage-backed security, issued by US Government agency securities
Securities available for sale
Amortized Cost	20,517,000
Gross Unrealized Losses	(1,189,000)
Estimated Fair Value	19,328,000
Mortgage-backed security, issued by US Government-sponsored enterprises
Securities available for sale
Amortized Cost	17,522,000
Gross Unrealized Losses	(633,000)
Estimated Fair Value	16,889,000
Collateralized mortgage obligations, issued by US Government agency securities
Securities available for sale
Amortized Cost	18,009,000
Gross Unrealized Losses	(461,000)
Estimated Fair Value	17,548,000
Collateralized mortgage obligations issued by US Government sponsored enterprises.
Securities available for sale
Amortized Cost	33,489,000
Gross Unrealized Gains	1,000
Gross Unrealized Losses	(249,000)
Estimated Fair Value	33,241,000
Corporate debt securities
Securities held to maturity:
Amortized cost	22,000,000	22,000,000
Gross Unrealized Gains	59,000	55,000
Gross Unrealized Losses	(3,181,000)	(2,898,000)		(2,049,000)
Estimated Fair Value	18,878,000	19,157,000		17,951,000
Allowance for Credit Losses	216,000	262,000	$ 238,000
Net Carrying Value	21,784,000	21,738,000
Amortized cost				20,000,000
Net Carrying Value				20,000,000
Municipal obligations
Securities available for sale
Amortized Cost	17,782,000	13,419,000
Gross Unrealized Gains	51,000	5,000		9,000
Gross Unrealized Losses	(8,000)	(8,000)		(67,000)
Estimated Fair Value	17,825,000	13,416,000
Amortized Cost				53,492,000
Estimated Fair Value				53,434,000
Securities held to maturity:
Amortized cost	3,616,000	3,352,000
Gross Unrealized Losses	(37,000)	(72,000)		(156,000)
Estimated Fair Value	3,579,000	3,280,000		3,793,000
Net Carrying Value	$ 3,616,000	3,352,000
Amortized cost				3,949,000
Net Carrying Value				3,949,000
Other debt securities
Securities available for sale
Amortized Cost		212,000
Gross Unrealized Gains		305,000		309,000
Gross Unrealized Losses		(73,000)		(66,000)
Estimated Fair Value		$ 444,000
Amortized Cost				261,000
Estimated Fair Value				$ 504,000