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Employee Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 03, 2020
Dec. 28, 2018
Dec. 29, 2017
Swiss Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost [1] $ 739 $ 474 $ 381
Interest cost [2] 77 56 53
Expected return on plan assets [2] (147) (116) (94)
Prior service credit [2],[3] (21) (21) (7)
Actuarial loss recognized in current period [2],[3] 129 113 72
Net periodic pension cost 777 506 405
Japan Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost [1] 185 153 147
Interest cost [4] 7 4 4
Net amortization of transitional obligation [4],[5]   11 11
Prior service credit [4],[5] (1) (1) (1)
Actuarial loss recognized in current period [4],[5] 0 0 (3)
Net periodic pension cost $ 191 $ 167 $ 158
[1] Recognized in selling general and administrative expenses on the Consolidated Statements of Operations.
[2] For years ended 2019 and 2018, recognized in other income (expense), net, and for the year ended 2017, 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 years ended 2019 and 2018, recognized in other income (expense), net, and for the year ended 2017, recognized in selling, general and administrative expenses on the Consolidated Statements of Operations.
[5] Amounts reclassified from accumulated other comprehensive loss