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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
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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

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