Investments (Schedule Of Changes In Equity Investments) (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Balance at the beginning of the period		$ 44,142	$ 52,103
Investments		21,788	31,616
Observable price adjustments on non-marketable equity securities		1,000
Ongoing mark-to-market adjustments on marketable equity securities		13,515
Reclassifications	[1]
Impairment of investments			(14,519)
Loss attributable to equity method investments		(11,205)	(25,058)	$ (15,833)
Carrying value at the end of the period		69,240	44,142	52,103
Non-marketable Securities [Member]
Balance at the beginning of the period		30,033	30,436
Investments		2,538	14,116
Observable price adjustments on non-marketable equity securities		1,000
Ongoing mark-to-market adjustments on marketable equity securities
Reclassifications	[1]	(10,569)
Impairment of investments			(14,519)
Loss attributable to equity method investments
Carrying value at the end of the period		23,002	30,033	30,436
Marketable Securities [Member]
Balance at the beginning of the period
Investments		5,000
Observable price adjustments on non-marketable equity securities
Ongoing mark-to-market adjustments on marketable equity securities		13,515
Reclassifications	[1]	10,569
Impairment of investments
Loss attributable to equity method investments
Carrying value at the end of the period		29,084
Equity Method Investments [Member]
Balance at the beginning of the period		14,109	21,667
Investments		14,250	17,500
Observable price adjustments on non-marketable equity securities
Ongoing mark-to-market adjustments on marketable equity securities
Reclassifications	[1]
Impairment of investments
Loss attributable to equity method investments		(11,205)	(25,058)
Carrying value at the end of the period		$ 17,154	$ 14,109	$ 21,667

[1] During the year ended June 30, 2021, one of our investments, which was previously accounted for under the measurement alternative, completed its initial public offering which resulted in a change of accounting methodology to fair value.