Restructuring Charges - Changes in Restructuring Reserves (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jul. 01, 2023	Apr. 01, 2023	Oct. 01, 2022	Jul. 02, 2022	Apr. 02, 2022
Restructuring Cost and Reserve [Line Items]
Beginning balance				$ 634	$ 797	$ 1,023
Provision for restructuring charges associated with Photonics divestiture				5	4	114
Cash payments made				(154)	(167)	(265)
Non-cash utilization						(75)
Ending balance				485	634	797
Severance And Other Employee Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance				168	258	358
Provision for restructuring charges associated with Photonics divestiture				0	0	112
Cash payments made				(77)	(90)	(137)
Non-cash utilization						(75)
Ending balance				91	168	258
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 162	$ 240	$ 318	466	539	665
Provision for restructuring charges associated with Photonics divestiture	2	2	3	5	4	2
Cash payments made	(80)	(80)	(81)	(77)	(77)	(128)
Non-cash utilization						0
Ending balance	$ 84	$ 162	$ 240	$ 394	$ 466	$ 539