Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2018	Oct. 03, 2017	Jul. 04, 2017	Apr. 04, 2017	Jan. 03, 2017	Sep. 27, 2016	Jun. 28, 2016	Mar. 29, 2016	Jan. 02, 2018	Jan. 03, 2017	Dec. 29, 2015
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ (487)	$ (8,335)	$ (8,816)	$ (27,810)					$ (45,449)	$ (71,677)	$ (13,765)
Net loss	$ (487)	$ (8,335)	$ (1,815)	$ (26,845)	$ (45,376)	$ (9,841)	$ (14,087)	$ (2,373)	$ (37,482)	$ (71,677)	$ (13,765)
Shares:
Basic weighted average shares outstanding (in shares)									37,759,497	27,808,708	28,938,901
Dilutive stock options and warrants (in shares)									0	0	0
Diluted weighted average number of shares outstanding (in shares)									37,759,497	27,808,708	28,938,901
Earnings per share:
Basic EPS (USD per share)	$ (0.01)	$ (0.20)	$ (0.22)	$ (0.99)	$ (1.63)	$ (0.35)	$ (0.51)	$ (0.09)	$ (1.20)	$ (2.58)	$ (0.48)
Diluted EPS (USD per share)	$ (0.01)	$ (0.20)	$ (0.22)	$ (0.99)	$ (1.63)	$ (0.35)	$ (0.51)	$ (0.09)	$ (1.20)	$ (2.58)	$ (0.48)
Antidilutive securities excluded from computation of earnings per share									4,154,778	2,697,697	3,184,949