Investments (Schedule Of Investments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Investments	$ 2,741	$ 2,467
Impairment of investments	(2,590)	(1,711)
Loss attributable to equity method investments	(6,863)
Carrying value of investments	45,391	41,982
Equity Method Investments [Member]
Balance at the beginning of the period	21,667
Loss attributable to equity method investments	(6,863)
Carrying value of investments	14,804
Non-marketable Securities [Member]
Balance at the beginning of the period	30,436	41,226
Investments	2,741	2,467
Impairment of investments	(2,590)	(1,711)
Carrying value of investments	$ 30,587	$ 41,982