Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 28, 2020	Mar. 29, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 28, 2020	Jun. 30, 2019
Earnings Per Share, Basic [Abstract]
Net income (loss)	$ 7,842	$ (22,209)	$ (3,732)	$ (11,469)	$ (14,367)	$ (15,201)
Net income (loss) available to common stockholders	$ 6,485		$ (3,732)		$ (14,367)	$ (15,201)
Weighted average common shares outstanding	50,916,758		41,051,354		50,868,929	38,548,246
Basic net income (loss) per share (in dollars per share)	$ 0.13		$ (0.09)		$ (0.28)	$ (0.39)
Diluted net income (loss) per share:
Net income (loss)	$ 7,842	$ (22,209)	$ (3,732)	$ (11,469)	$ (14,367)	$ (15,201)
Weighted average common shares outstanding (in shares)	50,916,758		41,051,354		50,868,929	38,548,246
Dilutive effect of preferred stock and non-vested shares (in shares)	9,415,059		0		0	0
Shares used in computing diluted net income (loss) per share (in shares)	60,331,817		41,051,354		50,868,929	38,548,246
Diluted net income (loss) per share (in shares)	$ 0.13		$ (0.09)		$ (0.28)	$ (0.39)
Shares excluded from diluted net income (loss) per share computations (in shares)	0		17,755,355		10,652,278	17,755,355
Restricted Stock [Member]
Earnings Per Share, Basic [Abstract]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 158		$ 0		$ 0	$ 0
Preferred Stock [Member]
Earnings Per Share, Basic [Abstract]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 1,199		$ 0		$ 0	$ 0