Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2019	Oct. 02, 2018	Jul. 03, 2018	Apr. 03, 2018	Jan. 02, 2018	Oct. 03, 2017	Jul. 04, 2017	Apr. 04, 2017	Jan. 01, 2019	Jan. 02, 2018	Jan. 03, 2017
Earnings Per Share [Abstract]
Shares Issued upon Conversion (shares)								18,500
Net Income (Loss) Available to Common Stockholders, Basic					$ (487)	$ (8,335)	$ (8,816)	$ (27,810)	$ (8,441)	$ (45,449)	$ (71,677)
Net loss	$ 19	$ 1,050	$ (5,935)	$ (3,575)	$ (487)	$ (8,335)	$ (1,815)	$ (26,845)	$ (8,441)	$ (37,482)	$ (71,677)
Shares:
Basic weighted average shares outstanding (in shares)									42,329,556	37,759,497	27,808,708
Dilutive stock options and warrants (in shares)									0	0	0
Diluted weighted average number of shares outstanding (in shares)									42,329,556	37,759,497	27,808,708
Earnings per share:
Basic EPS (USD per share)	$ 0	$ 0.02	$ (0.14)	$ (0.09)	$ (0.01)	$ (0.20)	$ (0.22)	$ (0.99)	$ (0.20)	$ (1.20)	$ (2.58)
Diluted EPS (USD per share)	$ 0	$ 0.02	$ (0.14)	$ (0.09)	$ (0.01)	$ (0.20)	$ (0.22)	$ (0.99)	$ (0.20)	$ (1.20)	$ (2.58)
Antidilutive securities excluded from computation of earnings per share									2,829,630	4,154,778	2,697,697