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Balance Sheet Details - Warranty Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 02, 2021
Sep. 26, 2020
Oct. 02, 2021
Sep. 26, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]        
Balance at beginning of period $ 9,911 $ 7,732 $ 9,208 $ 7,294
Provision for warranty and retrofit charged to cost of revenue 769 1,716 2,974 4,341
Utilization of reserve (554) (892) (2,056) (3,079)
Balance at end of period $ 10,126 $ 8,556 $ 10,126 $ 8,556