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Goodwill and Intangible Assets - Summary of Components of Gross and Net Intangible Asset (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 27, 2020
Dec. 28, 2019
Schedule of Intangible Assets    
Net Carrying Amount $ 76 $ 84 [1]
Customer relationships    
Schedule of Intangible Assets    
Gross Carrying Amount 240 240
Accumulated Amortization 164 156
Net Carrying Amount $ 76 $ 84
Remaining Amortization Life 4 years 9 months  
[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.