Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2019	Jul. 03, 2018	Jul. 02, 2019	Jul. 03, 2018	Jan. 01, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Document Period End Date			Jul. 02, 2019
Net Income (Loss) Available to Common Stockholders, Basic	$ 438	$ (5,935)	$ (1,413)	$ (9,510)
Net loss	$ 438	$ (5,935)	$ (1,413)	$ (9,510)
Shares:
Basic weighted average shares outstanding (in shares)	43,964,175	41,172,924	43,955,580	41,150,698
Effect of dilutive securities (in shares)	1,111,713	0	0	0
Diluted weighted average number of shares outstanding (in shares)	45,075,888	41,172,924	43,955,580	41,150,698
Earnings (loss) per share:
Basic loss per share (USD per share)	$ 0.01	$ (0.14)	$ (0.03)	$ (0.23)
Diluted loss per share (USD per share)	$ 0.01	$ (0.14)	$ (0.03)	$ (0.23)
Preferred stock, shares issued (in shares)	0		0		0
Antidilutive securities excluded from computation of earnings per share	1,297,255	2,630,523	3,229,030	3,043,387