Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Oct. 01, 2019	Jul. 02, 2019	Apr. 02, 2019	Jan. 01, 2019	Oct. 02, 2018	Jul. 03, 2018	Apr. 03, 2018	Dec. 31, 2019	Jan. 01, 2019	Jan. 02, 2018	Apr. 04, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to common stockholders									$ 1,647	$ (8,441)	$ (45,449)
Shares:
Basic weighted average shares outstanding (in shares)									44,036,947	42,329,556	37,759,497
Dilutive stock options and warrants (in shares)									939,489	0	0
Diluted weighted average number of shares outstanding (in shares)									44,976,436	42,329,556	37,759,497
Earnings per share:
Basic EPS (USD per share)	$ (0.03)	$ 0.10	$ 0.10	$ (0.04)	$ 0	$ 0.02	$ (0.14)	$ (0.09)	$ 0.04	$ (0.20)	$ (1.20)
Diluted EPS (USD per share)	$ (0.03)	$ 0.09	$ 0.10	$ (0.04)	$ 0	$ 0.02	$ (0.14)	$ (0.09)	$ 0.04	$ (0.20)	$ (1.20)
Antidilutive securities excluded from computation of earnings per share									1,513,552	2,829,630	4,154,778
Shares issued upon conversion (shares)												18,500