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Employee Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Swiss Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost [1] $ 474 $ 381 $ 469
Interest cost [2] 56 53 65
Expected return on plan assets [2] (116) (94) (89)
Prior service credit [2],[3] (21) (7) (7)
Actuarial loss recognized in current period [2],[3] 113 72 111
Net periodic pension cost 506 405 549
Japan Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost [1] 153 147 148
Interest cost [4] 4 4 6
Net amortization of transitional obligation [4],[5] 11 11 12
Prior service credit [4],[5] (1) (1) (1)
Actuarial loss recognized in current period [4],[5] 0 (3) (13)
Net periodic pension cost $ 167 $ 158 $ 152
[1] Recognized in selling general and administrative expenses on the Consolidated Statements of Operations.
[2] For year ended 2018, recognized in other income (expense), net, and for years ended 2017 and 2016, recognized in selling, general and administrative expenses on the Consolidated Statements of Operations.
[3] Amounts reclassified from accumulated other comprehensive income (loss).
[4] For the year ended 2018, recognized in other income (expense), net, and for the years ended 2017 and 2016, recognized in selling, general and administrative expenses on the Consolidated Statements of Operations.
[5] Amounts reclassified from accumulated other comprehensive loss