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Balance Sheet Components (Property and Equipment, Other Information) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2021
Sep. 27, 2020
Oct. 03, 2021
Sep. 27, 2020
Balance Sheet Related Disclosures [Abstract]        
Depreciation expense $ 2.8 $ 3.3 $ 8.8 $ 9.5