Geographic Assets - Composition of Long-Lived Assets (Details) - USD ($) $ in Thousands		Jan. 02, 2026	Dec. 27, 2024
Revenues From External Customers And Long Lived Assets [Line Items]
Property, plant and equipment, net		$ 73,323	$ 84,889
Finance lease ROU assets, net			37
Operating lease ROU assets, net		29,609	36,850
Cloud-based software		30,700	15,763
Total		133,632	137,539
U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Property, plant and equipment, net		55,621	68,318
Finance lease ROU assets, net			37
Operating lease ROU assets, net		21,454	27,754
Cloud-based software		30,700	15,763
Total		107,775	111,872
SWITZERLAND
Revenues From External Customers And Long Lived Assets [Line Items]
Property, plant and equipment, net		17,311	16,084
Finance lease ROU assets, net
Operating lease ROU assets, net		5,346	6,414
Total		22,657	22,498
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Property, plant and equipment, net	[1]	391	487
Finance lease ROU assets, net	[1]		0
Operating lease ROU assets, net	[1]	2,809	2,682
Total	[1]	$ 3,200	$ 3,169

[1] No other location individually exceeds 10% of each category of long-lived assets.