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Investments (Schedule Of Reconciliation Of Changes In Non-Marketable Equity Investments) (Details) - USD ($) $ in Thousands | 6 Months Ended
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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.

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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117539-209714 + Details
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