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Balance Sheet Components (Advance Payments and Unearned Revenue) (Details) - USD ($)
$ in Thousands
Mar. 29, 2019
Jun. 30, 2018
Jun. 29, 2018
Balance Sheet Related Disclosures [Abstract]      
Advance payments $ 1,836   $ 7,151
Unearned revenue 16,671   12,149
Total advance payments and unearned revenue 18,507 $ 12,700 19,300
Unearned revenue, long-term $ 8,071 $ 7,295 $ 6,593