Earnings (Loss) Per Share (Narrative) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
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	753,645	187,516	876,593
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	2,629,179	3,176,284	3,079,418	3,176,284
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	12,000,000		12,000,000
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	12,385,714	11,333,333	12,385,714	11,333,333