Operating Segments (Long-Lived Assets Based On Geographical Location) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 134,372	$ 374,597	$ 787,933
Restatement Adjustment [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets		2,689	1,987
South Africa [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	68,521	141,235	493,902
Liechtenstein [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	29,739	47,240	48,129
India [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	26,993	26,993	26,917
South Korea [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	0	149,390	177,388
Rest Of World [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 9,119	$ 9,739	$ 41,597