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Geographic Assets - Composition of Long-Lived Asset (Details) - USD ($)
$ in Thousands
Jun. 27, 2025
Dec. 27, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment, net $ 74,417 $ 84,889
Finance lease right-of-use assets, net 0 37
Operating lease right-of-use assets, net 33,027 36,850
Total 107,444 121,776
UNITED STATES    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment, net 57,007 68,318
Finance lease right-of-use assets, net   37
Operating lease right-of-use assets, net 23,434 27,754
Total 80,441 96,109
SWITZERLAND    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment, net 16,926 16,084
Operating lease right-of-use assets, net 5,851 6,414
Total 22,777 22,498
Other [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment, net 484 487
Operating lease right-of-use assets, net 3,742 2,682
Total $ 4,226 $ 3,169