Investments (Schedule Of Reconciliation Of Changes In Non-Marketable Equity Investments) (Details) - USD ($) $ in Thousands		6 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Non-marketable Securities
Balance at the beginning of the period		$ 30,033
Impairment of investments		4,776	$ (5,419)
Carrying value of non-marketable securities		21,410
Non-marketable Securities [Member]
Non-marketable Securities
Balance at the beginning of the period		30,033	30,436
Investments		1,946	4,341
Impairment of investments			(5,419)
Reclassification to marketable securities	[1]	(10,569)
Carrying value of non-marketable securities		$ 21,410	$ 29,358

[1] During the six months ended December 31, 2020, 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.