Earnings (Loss) Per Share (Narrative) (Details) - shares	1 Months Ended	12 Months Ended
	Feb. 22, 2021	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		1,913,751	3,528,899	2,384,249
Stock Options And Restricted Stock Units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		2,305,630	370,670	452,316
Series A Preferred Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares issuable on an if-converted basis adjusted to diluted EPS		12,633,427	11,333,333	11,333,333
Series A Preferred Stock [Member] | Oaktree Capital Management L.P. [Member] | Subsequent Event [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Series A Preferred Stock exchanged for common shares	12,633,427
Percentage of issued and outstanding common shares on a post-exchange basis	12.30%
Series B Preferred Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares issuable on an if-converted basis adjusted to diluted EPS		12,178,667