Weighted-Average Shares (Details) - shares	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock equivalents excluded from calculation of diluted net loss per share (shares)		3,120,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Anti-dilutive securities excluded from computation of earnings per share (shares)	701,000	5,801,000	591,000	6,328,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Anti-dilutive securities excluded from computation of earnings per share (shares)	500	27,000	1,000	14,000