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Goodwill and Intangible Assets - Future Estimated Amortization Expense (Details) - USD ($)
$ in Thousands
Jun. 27, 2020
Dec. 28, 2019
[1]
Future estimated amortization expense    
2020 (six months) $ 8  
2021 16  
2022 16  
2023 16  
2024 16  
Thereafter 4  
Net Carrying Amount $ 76 $ 84
[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended December 28, 2019.