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Net Income (Loss) Per Share Earnings Per Share Table (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 03, 2021	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (18,627)	$ 3,531	$ 7,842	$ (22,209)	$ (9,906)	$ (6,812)	$ (3,732)	$ (11,469)	$ (29,463)	$ (31,919)	$ 10,104
Net income available to common stockholders									$ (29,463)	$ (31,919)	$ 7,855
Basic weighted average common shares outstanding									50,751,185	43,421,715	35,715,372
Basic and diluted net income (loss) per share	$ (0.37)	$ 0.06	$ 0.13	$ (0.44)	$ (0.20)	$ (0.15)	$ (0.09)	$ (0.32)	$ (0.58)	$ (0.74)	$ 0.22
Net income (loss)	$ (18,627)	$ 3,531	$ 7,842	$ (22,209)	$ (9,906)	$ (6,812)	$ (3,732)	$ (11,469)	$ (29,463)	$ (31,919)	$ 10,104
Basic weighted average common shares outstanding									50,751,185	43,421,715	35,715,372
Weighted Average Number Diluted Shares Outstanding Adjustment									0	0	9,604,599
Diluted weighted average common shares outstanding									50,751,185	43,421,715	45,319,971
Basic and diluted net income (loss) per share	$ (0.37)	$ 0.06	$ 0.13	$ (0.44)	$ (0.20)	$ (0.15)	$ (0.09)	$ (0.32)	$ (0.58)	$ (0.74)	$ 0.22
Earnings Per Share, Diluted									$ (0.58)	$ (0.74)	$ 0.22
Shares excluded from diluted net income (loss) per share computations (2)									9,615,435	11,484,159	0
Restricted Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ 0	$ (178)
Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ 0	$ (2,071)