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Geographic Assets - Composition of Long-Lived Assets (Details) - USD ($)
$ in Thousands
Jan. 03, 2020
Dec. 28, 2018
Revenues From External Customers And Long Lived Assets [Line Items]    
Property, plant and equipment, net $ 17,065 $ 11,451
Finance lease ROU assets, net 1,867  
Operating lease ROU assets, net 6,684  
Intangible assets, net 296 243
Total 25,912 11,694
U.S.    
Revenues From External Customers And Long Lived Assets [Line Items]    
Property, plant and equipment, net 14,956 10,416
Finance lease ROU assets, net 1,756  
Operating lease ROU assets, net 2,920  
Intangible assets, net 83  
Total 19,715 10,416
JAPAN    
Revenues From External Customers And Long Lived Assets [Line Items]    
Property, plant and equipment, net 306 330
Finance lease ROU assets, net 80  
Operating lease ROU assets, net 919  
Intangible assets, net 213 243
Total 1,518 573
SWITZERLAND    
Revenues From External Customers And Long Lived Assets [Line Items]    
Property, plant and equipment, net 1,803 705
Finance lease ROU assets, net 31  
Operating lease ROU assets, net 2,845  
Total $ 4,679 $ 705