Restructuring Charges - Narrative (Details) $ in Thousands		3 Months Ended			6 Months Ended
	Dec. 23, 2019 USD ($) office	Jul. 04, 2021 USD ($)	Jul. 05, 2020 USD ($)	Dec. 29, 2019 USD ($)	Jul. 04, 2021 USD ($)	Jul. 05, 2020 USD ($)	Jan. 03, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ (62)	$ (157)		$ (192)	$ (1,275)
Restructuring Reserve Balance		300			300
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ 9,000
Number of employees	105
Number of office leases | office	2
Future cash expenditures for restructuring	$ 9,000
Expected savings from restructuring		6,000			6,000
2019 Restructuring Plan | Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				8,800	192
Restructuring Reserve Balance		$ 293			$ 293		$ 1,064
2019 Restructuring Plan | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ 200