Geographic Assets - Composition of Long-Lived Asset (Details) - USD ($) $ in Thousands	Mar. 28, 2025	Dec. 27, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 74,957	$ 84,889
Finance lease right-of-use assets, net	0	37
Operating lease right-of-use assets, net	31,047	36,850
Total	106,004	121,776
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	58,034	68,318
Finance lease right-of-use assets, net		37
Operating lease right-of-use assets, net	22,478	27,754
Total	80,512	96,109
SWITZERLAND
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	16,396	16,084
Operating lease right-of-use assets, net	6,133	6,414
Total	22,529	22,498
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	527	487
Operating lease right-of-use assets, net	2,436	2,682
Total	$ 2,963	$ 3,169