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, 2020	Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade, net	$ 10,288	$ 8,458
Accounts receivable, trade, gross	10,647	8,711
Allowance for doubtful accounts receivable, end of period	359	253
Beginning of period	253	661
Reversed to statement of operations	0	(155)
Charged to statement of operations	70	181
Utilized	(11)	(151)
Deconsolidation	0	(178)
Foreign currency adjustment	47	(105)
Taxes refundable related to sale of Net1 Korea	0	19,796
Other receivables	11,159	9,058
Total accounts receivable, net and other receivables	24,447	43,068
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	$ 2,756