Goodwill and Intangible Assets - Summary of Components of Gross and Net Intangible Asset (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Dec. 28, 2019
Schedule of Intangible Assets
Net Carrying Amount	$ 72	$ 84	[1]
Customer relationships
Schedule of Intangible Assets
Gross Carrying Amount	240	240
Accumulated Amortization	168	156
Net Carrying Amount	$ 72	$ 84
Remaining Amortization Life	4 years 6 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.