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Balance Sheet Components (Allowance for Product Returns) (Details) - Allowance for Product Returns [Member] - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period | $ 27,963 | $ 25,897 | $ 11,266
Additions | 67,113 | 76,802 | 85,190
Deductions | (77,705) | (74,736) | (70,559)
Balance at end of period | $ 17,371 | $ 27,963 | $ 25,897

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