Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jul. 02, 2019	Jun. 30, 2020	Jul. 02, 2019
Earnings Per Share [Abstract]
Net loss	$ (13,478)	$ 438	$ (19,313)	$ (1,413)
Shares:
Basic weighted average shares outstanding (in shares)	44,212,751	43,964,175	44,177,648	43,955,580
Effect of dilutive securities (in shares)	0	1,111,713	0	0
Diluted weighted average number of shares outstanding (in shares)	44,212,751	45,075,888	44,177,648	43,955,580
Earnings (loss) per share:
Basic loss per share (USD per share)	$ (0.30)	$ 0.01	$ (0.44)	$ (0.03)
Diluted loss per share (USD per share)	$ (0.30)	$ 0.01	$ (0.44)	$ (0.03)
Anti-dilutive securities
Antidilutive securities excluded from computation of earnings per share	4,142,754	1,297,255	3,309,278	3,229,030