Accounts Receivable, Net And Other Receivables And Finance Loans Receivable, Net (Schedule Of Accounts Receivable, Net And Other Receivables) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2025	Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, net	$ 18,037	$ 13,262
Accounts receivable, trade, gross	19,881	14,503
Less: Allowance for doubtful accounts receivable, end of period	1,844	1,241
Beginning of period	1,241	509
Other receivables	18,090	23,405
Total accounts receivable, net and other receivables	$ 36,127	$ 36,667
Notes 8.625 Percent [Member] | Investment In Cedar Cellular Investment One [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	8.625%	8.625%
Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reversed to statement of operations	$ (85)	$ (511)
Charged to statement of operations	1,444	1,305
Utilized	(732)	(67)
Foreign currency adjustment	(24)	5
Other receivables	18,090	23,405
Total accounts receivable, net and other receivables	36,127	36,667
Accounts Receivable [Member] | Held To Maturity Investments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, net and other receivables	0	0
Accounts Receivable [Member] | Investment In Cedar Cellular Investment One [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, gross	0	0
Carbon [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful loans receivable	750	750
Carbon [Member] | Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, net and other receivables	$ 0	$ 0
Cedar Cellular Investment1 Ltd [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equity ownership percentage	7.625%	7.625%