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Segment and Geographic Information - Property and Equipment, Net by Country (Details) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net $ 34,883 $ 40,423 $ 49,481
United States      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 27,353 30,338 30,532
China      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 2,360 4,632 10,617
Philippines      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 3,319 3,883 4,928
Taiwan      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 949 958 2,310
Japan      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 324 313 637
Other      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net 578 299 457
Foreign      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Property and equipment, net $ 7,530 $ 10,085 $ 18,949