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Summary of Significant Accounting Policies - Schedule of intercompany foreign currency balances (Details) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Product Information [Line Items] |  |  |
Foreign currency remeasurement and transaction gain (losses) | $ 4,143 | $ (4,035) | $ (941)
Other income (expense) |  |  |
Product Information [Line Items] |  |  |
Foreign currency remeasurement and transaction gain (losses) | $ 6,594 | $ (8,622) | $ (1,245)

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