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Balance Sheet Components - Inventory (Details) - USD ($)
$ in Thousands
Dec. 26, 2020
Dec. 28, 2019
Balance Sheet Components [Abstract]    
Raw materials $ 48,122 $ 38,528
Work-in-progress 30,806 29,720
Finished goods 20,301 15,010
Inventory, net $ 99,229 $ 83,258