Stockholders' Equity - Equity Incentive Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2026	Jul. 04, 2025	Jul. 03, 2026	Jul. 04, 2025	Jan. 02, 2026
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 3,372	$ 4,562	$ 7,492	$ 7,917
General Motors
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Bailment pool arrangement, maximum allocation	49,500		49,500		$ 49,500
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	239	347	522	645
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	2,233	3,359	5,255	5,695
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	511	395	944	727
Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 389	$ 461	$ 771	$ 850