Net Income (Loss) Per Share Earnings Per Share Table (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (9,906)	$ (6,812)	$ (3,732)	$ (11,469)	$ 1,807	$ 3,611	$ 7,788	$ (3,102)	$ (31,919)	$ 10,104	$ 7,159
Net income available to common stockholders									$ (31,919)	$ 7,855	$ 5,562
Basic weighted average common shares outstanding									43,421,715	35,715,372	35,416,531
Basic and diluted net income (loss) per share	$ (0.20)	$ (0.15)	$ (0.09)	$ (0.32)	$ 0.04	$ 0.08	$ 0.17	$ (0.09)	$ (0.74)	$ 0.22	$ 0.16
Net income (loss)	$ (9,906)	$ (6,812)	$ (3,732)	$ (11,469)	$ 1,807	$ 3,611	$ 7,788	$ (3,102)	$ (31,919)	$ 10,104	$ 7,159
Basic weighted average common shares outstanding									43,421,715	35,715,372	35,416,531
Weighted Average Number Diluted Shares Outstanding Adjustment									0	9,604,599	9,559,983
Diluted weighted average common shares outstanding									43,421,715	45,319,971	44,976,514
Basic and diluted net income (loss) per share	$ (0.20)	$ (0.15)	$ (0.09)	$ (0.32)	$ 0.04	$ 0.08	$ 0.17	$ (0.09)	$ (0.74)	$ 0.22	$ 0.16
Earnings Per Share, Diluted									$ (0.74)	$ 0.22	$ 0.16
Shares excluded from diluted net income (loss) per share computations (2)									11,484,159	0	0
Restricted Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ (178)	$ (118)
Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ 0	$ (2,071)	$ (1,479)