Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Total Stockholders’ Equity	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Noncontrolling Interests in Subsidiaries
Stockholders' equity, beginning of period (in shares) at Jan. 02, 2022			173,051
Stockholders' equity, beginning of period at Jan. 02, 2022	$ 390,024	$ 388,389	$ 173	$ 2,714,500	$ (215,240)	$ 11,168	$ (2,122,212)	$ 1,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(28,460)	(27,871)					(27,871)	(589)
Other comprehensive income	2	2				2
Issuance of restricted stock to employees, net of cancellations (in shares)			1,201
Issuance of restricted stock to employees, net of cancellations	1	1	$ 1
Stock-based compensation expense	5,427	5,427		5,427
Purchases of treasury stock (in shares)			(407)
Purchases of treasury stock	(7,333)	(7,333)			(7,333)
Stockholders' equity, end of period (in shares) at Apr. 03, 2022			173,845
Stockholders' equity, end of period at Apr. 03, 2022	359,661	358,615	$ 174	2,719,927	(222,573)	11,170	(2,150,083)	1,046
Stockholders' equity, beginning of period (in shares) at Jan. 02, 2022			173,051
Stockholders' equity, beginning of period at Jan. 02, 2022	390,024	388,389	$ 173	2,714,500	(215,240)	11,168	(2,122,212)	1,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	(29)
Stockholders' equity, end of period (in shares) at Jul. 03, 2022			174,081
Stockholders' equity, end of period at Jul. 03, 2022	419,091	413,317	$ 174	2,840,028	(224,829)	11,139	(2,213,195)	5,774
Stockholders' equity, beginning of period (in shares) at Apr. 03, 2022			173,845
Stockholders' equity, beginning of period at Apr. 03, 2022	359,661	358,615	$ 174	2,719,927	(222,573)	11,170	(2,150,083)	1,046
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(62,327)	(63,112)					(63,112)	785
Other comprehensive income	(31)	(31)				(31)
Issuance of restricted stock to employees, net of cancellations (in shares)			359
Stock-based compensation expense	7,071	7,071		7,071
Purchases of treasury stock (in shares)			(123)
Purchases of treasury stock	(2,256)	(2,256)			(2,256)
Gain on sale of C&I Solutions business, net of tax	116,973	113,030		113,030				3,943
Stockholders' equity, end of period (in shares) at Jul. 03, 2022			174,081
Stockholders' equity, end of period at Jul. 03, 2022	$ 419,091	413,317	$ 174	2,840,028	(224,829)	11,139	(2,213,195)	5,774
Stockholders' equity, beginning of period (in shares) at Jan. 01, 2023	174,269		174,269
Stockholders' equity, beginning of period at Jan. 01, 2023	$ 575,654	574,851	$ 174	2,855,930	(226,646)	11,568	(2,066,175)	803
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(50,603)	(50,684)					(50,684)	81
Other comprehensive income	5	5				5
Issuance of restricted stock to employees, net of cancellations (in shares)			959
Issuance of restricted stock to employees, net of cancellations	1	1	$ 1
Stock-based compensation expense	6,877	6,877		6,877
Purchases of treasury stock (in shares)			(327)
Purchases of treasury stock	(5,071)	(5,071)			(5,071)
Net working capital settlement related to the sale of our C&I Solutions business, net of taxes of $0.3 million	(23,574)	(23,574)		(23,574)
Stockholders' equity, end of period (in shares) at Apr. 02, 2023			174,901
Stockholders' equity, end of period at Apr. 02, 2023	$ 503,289	502,405	$ 175	2,839,233	(231,717)	11,573	(2,116,859)	884
Stockholders' equity, beginning of period (in shares) at Jan. 01, 2023	174,269		174,269
Stockholders' equity, beginning of period at Jan. 01, 2023	$ 575,654	574,851	$ 174	2,855,930	(226,646)	11,568	(2,066,175)	803
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	$ 18
Stockholders' equity, end of period (in shares) at Jul. 02, 2023	175,173		175,173
Stockholders' equity, end of period at Jul. 02, 2023	$ 477,676	476,778	$ 175	2,847,884	(232,940)	11,586	(2,149,927)	898
Stockholders' equity, beginning of period (in shares) at Apr. 02, 2023			174,901
Stockholders' equity, beginning of period at Apr. 02, 2023	503,289	502,405	$ 175	2,839,233	(231,717)	11,573	(2,116,859)	884
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(33,054)	(33,068)					(33,068)	14
Other comprehensive income	13	13				13
Issuance of restricted stock to employees, net of cancellations (in shares)			399
Stock-based compensation expense	8,659	8,659		8,659
Purchases of treasury stock (in shares)			(127)
Purchases of treasury stock	(1,223)	(1,223)			(1,223)
Other adjustments	$ (8)	(8)		(8)
Stockholders' equity, end of period (in shares) at Jul. 02, 2023	175,173		175,173
Stockholders' equity, end of period at Jul. 02, 2023	$ 477,676	$ 476,778	$ 175	$ 2,847,884	$ (232,940)	$ 11,586	$ (2,149,927)	$ 898