Accounts Receivable, Net And Other Receivables And Finance Loans Receivable, Net (Schedule Of Accounts Receivable, Net And Other Receivables) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, net	$ 26,568	$ 25,136
Accounts receivable, trade, gross	27,312	26,377
Allowance for doubtful accounts receivable, end of period	744	1,241
Beginning of year	1,241	1,101
Reversed to statement of operations	(535)	(24)
Charged to statement of operations	108	3,296
Utilized	(58)	(3,059)
Deconsolidated	0	(38)
Foreign currency adjustment	(12)	(35)
Current portion of payments to agents in South Korea amortized over the contract period	11,927	15,543
Cash payments to agents in South Korea amortized over the contract period	18,457	25,107
Less: Payments to agents in South Korea amortized over the contract period included in other long-term assets (Note 7)	6,530	9,564
Other receivables	27,070	24,555
Total accounts receivable, net	68,565	72,494
Carbon [Member] | Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan provided	3,000	3,000
DNI [Member] | Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan provided	$ 0	$ 4,260