Income Taxes (Components Of (Loss) Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Income Tax [Line Items]
Loss before income taxes	$ (39,900)	$ (5,619)	$ (65,016)
South Africa [Member]
Income Tax [Line Items]
Loss before income taxes	(31,266)	(30,825)	(26,230)
United States [Member]
Income Tax [Line Items]
Loss before income taxes	(8,509)	(6,686)	(8,984)
Liechtenstein [Member]
Income Tax [Line Items]
Loss before income taxes	(509)	(810)	(17,519)
Other Income Tax Segment [Member]
Income Tax [Line Items]
Loss before income taxes	$ 384	$ 32,702	$ (12,283)