Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2018	Jul. 04, 2017	Jul. 03, 2018	Jul. 04, 2017	Jan. 02, 2018	Feb. 08, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Document Period End Date			Jul. 03, 2018
Net Income (Loss) Available to Common Stockholders, Basic	$ (5,935)	$ (8,816)	$ (9,510)	$ (36,627)
Net loss	$ (5,935)	$ (1,815)	$ (9,510)	$ (28,660)
Shares:
Basic weighted average shares outstanding (in shares)	41,172,924	40,779,277	41,150,698	34,404,222
Effect of dilutive securities (in shares)	0	0	0	0
Diluted weighted average number of shares outstanding (in shares)	41,172,924	40,779,277	41,150,698	34,404,222
Loss per share:
Basic loss per share (USD per share)	$ (0.14)	$ (0.22)	$ (0.23)	$ (1.06)
Diluted loss per share (USD per share)	$ (0.14)	$ (0.22)	$ (0.23)	$ (1.06)
Preferred stock, shares issued (in shares)	0		0		0
Antidilutive securities excluded from computation of earnings per share	2,630,523	3,393,950	3,043,387	5,631,982
L Catterton | Preferred Stock
Loss per share:
Preferred stock, shares issued (in shares)		18,500		18,500		18,500