Accounts Receivable, Net And Other Receivables And Finance Loans Receivable, Net (Schedule Of Accounts Receivable, Net And Other Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, net	$ 12,332	$ 13,904
Accounts receivable, trade, gross	12,604	14,413
Allowance for doubtful accounts receivable, end of period	272	509
Beginning of year	509	267
Reversed to statement of operations	(3)	(133)
Charged to statement of operations	422	779
Utilized	(414)	(154)
Foreign currency adjustment	(242)	(250)
Other receivables	17,024	14,994
Total accounts receivable, net	29,356	28,898
Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current portion of amount outstanding related to sale of interest in Carbon, net of allowance: September 2022: $250	0	0
Accounts Receivable [Member] | Held To Maturity Investments [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]
Loan receivable allowance	250	3,000
Carbon [Member] | Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan provided	$ 0	0
Cedar Cellular Investment1 Ltd [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equity ownership percentage	7.625%
Cedar Cellular Investment1 Ltd [Member] | Notes8.625 Percent [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	8.625%
Cedar Cellular Investment1 Ltd [Member] | Investment In Cedar Cellular Investment One [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, gross	$ 0	$ 0