Investments (Schedule Of Investments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Investments			$ 31,616	$ 31,092
Impairment of investments			(14,519)	(8,801)
Loss attributable to equity method investments	$ (5,295)	$ (5,996)	(19,082)	(9,371)
Acquisition of controlling interest in previously held investment (note 21)				(5,000)
Carrying value of investments	50,118	49,146	50,118	49,146
Equity Method Investments [Member]
Balance at the beginning of the period			21,667
Investments			17,500	25,000
Loss attributable to equity method investments			(19,082)	(9,371)
Carrying value of investments	20,085	15,629	20,085	15,629
Non-marketable Securities [Member]
Balance at the beginning of the period			30,436	41,226
Investments			14,116	6,092
Impairment of investments			(14,519)	(8,801)
Carrying value of investments	$ 30,033	$ 33,517	$ 30,033	$ 33,517