Net Income (Loss) Per Share Earnings Per Share Table (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2022	Oct. 03, 2021	Jul. 04, 2021	Apr. 04, 2021	Jan. 03, 2021	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (16,400)	$ (9,902)	$ (9,559)	$ (7,168)	$ (18,627)	$ 3,531	$ 7,842	$ (22,209)	$ (43,029)	$ (29,463)	$ (31,919)
Net income available to common stockholders									$ (43,029)	$ (29,463)	$ (31,919)
Basic weighted average common shares outstanding									49,899,274	50,751,185	43,421,715
Basic and diluted net income (loss) per share	$ (0.33)	$ (0.20)	$ (0.19)	$ (0.14)	$ (0.37)	$ 0.06	$ 0.13	$ (0.44)	$ (0.86)	$ (0.58)	$ (0.74)
Net income (loss)	$ (16,400)	$ (9,902)	$ (9,559)	$ (7,168)	$ (18,627)	$ 3,531	$ 7,842	$ (22,209)	$ (43,029)	$ (29,463)	$ (31,919)
Basic weighted average common shares outstanding									49,899,274	50,751,185	43,421,715
Weighted Average Number Diluted Shares Outstanding Adjustment									0	0	0
Diluted weighted average common shares outstanding									49,899,274	50,751,185	43,421,715
Basic and diluted net income (loss) per share	$ (0.33)	$ (0.20)	$ (0.19)	$ (0.14)	$ (0.37)	$ 0.06	$ 0.13	$ (0.44)	$ (0.86)	$ (0.58)	$ (0.74)
Earnings Per Share, Diluted									$ (0.86)	$ (0.58)	$ (0.74)
Shares excluded from diluted net income (loss) per share computations (2)									9,681,878	9,615,435	11,484,159
Restricted Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ 0	$ 0
Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ 0	$ 0