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Income Taxes - Deferred Tax Valuation Allowance Activities (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($) $ in Thousands | 12 Months Ended
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Jun. 27, 2021 | Jun. 28, 2020 | Jun. 30, 2019
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period | $ (37,439) | $ (26,020) | $ (15,143)
Decrease (increase) in valuation allowance | 459 | (11,419) | (10,877)
Balance at end of period | $ (36,980) | $ (37,439) | $ (26,020)

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