Divestiture and Discontinued Operations - Summary of Components Discontinued Operations Related to Photonics Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Operating expenses:
Income (loss) from discontinued operations before provision for income taxes	$ (4,802)	$ (2,080)	$ (8,584)	$ (9,774)
Provision for income taxes	116	500	502	526
Net income (loss) from discontinued operations net of taxes	40	(238)	317	(373)
Photonics
Operating expenses:
Operating Expenses	(40)	238	(317)	373
Operating income (loss) – discontinued operations	40	(238)	317	(373)
Other income (expense) – discontinued operations	0	0	0	0
Income (loss) from discontinued operations before provision for income taxes	40	(238)	317	(373)
Provision for income taxes	0	0	0	0
Net income (loss) from discontinued operations net of taxes	40	(238)	317	(373)
Photonics | Selling, general and administrative
Operating expenses:
Operating Expenses	$ (40)	$ 238	$ (317)	$ 373