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Intangible Assets, Net - Finite-lived Intangible Assets Amortization Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Goodwill And Intangible Assets Disclosure [Abstract]      
Amortization expense $ 34 $ 221 $ 228