Goodwill and Intangible Assets - Summary of Components of Gross and Net Intangible Asset (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Schedule of Intangible Assets
Net Carrying Amount	$ 112	$ 116	[1]
Customer relations
Schedule of Intangible Assets
Gross Carrying Amount	240	240
Accumulated Amortization	128	124
Net Carrying Amount	$ 112	$ 116
Remaining Amortization Life	7 years

[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 30, 2017.