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Investments in Debt Securities (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Investments in Debt Securities (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Jun. 30, 2025
Components of investments in debt securities
Adjusted cost	$ 27,187,000		$ 27,187,000
Gross unrealized losses	(31,000)		(21,000)
Fair value	27,166,000		27,166,000
Fair value of available-for-sale debt securities, by contractual maturity
Due in one year or less	27,166,000		27,166,000
Amortization of premiums on debt securities	71,000	$ 0	159,000	$ 0
Allowance for Credit Loss, AFS Debt Securities	$ 0		$ 0		$ 0
Minimum
Investments in Debt Securities
Interest rate	3.55%		3.55%
Maximum
Investments in Debt Securities
Interest rate	4.625%		4.625%