Summary of Significant Accounting Policies - Schedule of Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020
Revenues [Line Items]
Revenue	$ 92,164	$ 89,146	$ 189,293	$ 176,095
Sales Revenue, Services, Net [Member] | Geographic Concentration Risk
Revenues [Line Items]
Revenue, percent	100.00%	100.00%	100.00%	100.00%
Revenue	$ 92,164	$ 89,146	$ 189,293	$ 176,095
Year-over-Year Change	3.40%		7.50%
North America [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk
Revenues [Line Items]
Revenue, percent	51.00%	55.40%	51.20%	56.60%
Revenue	$ 47,002	$ 49,357	$ 96,854	$ 99,664
Year-over-Year Change	(4.80%)		(2.80%)
Europe [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk
Revenues [Line Items]
Revenue, percent	49.00%	44.60%	48.80%	43.40%
Revenue	$ 45,162	$ 39,789	$ 92,439	$ 76,431
Year-over-Year Change	13.50%		20.90%