Accounts Receivable, Net And Other Receivables And Finance Loans Receivable, Net (Schedule Of Accounts Receivable, Net And Other Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Notes8.625 Percent [Member] | Investment In Cedar Cellular Investment One [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	8.625%
Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, net	$ 13,262	$ 11,037
Accounts receivable, trade, gross	14,503	11,546
Allowance for credit losses, end of period	1,241	509
Beginning of period	509	509
Reallocation to allowance for credit losses	0	(418)
Reversed to statement of operations	(511)	(31)
Charged to statement of operations	1,305	2,005
Utilized	(67)	(1,645)
Foreign currency adjustment	5	89
Other receivables	23,405	14,628
Total accounts receivable, net	36,667	25,665
Accounts Receivable [Member] | Held To Maturity Investments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, net	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	1,000
Carbon [Member] | Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, net	$ 0	$ 0
Cedar Cellular Investment1 Ltd [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equity ownership percentage	7.625%