Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	$ 116,120	$ 52,073
Fair Value measurements on a recurring basis
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	116,120	52,073
Derivative financial instruments - liability	2,328
Derivative financial instruments - asset		276
Deferred stock-based compensation	7,207	7,503
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	116,120	52,073
Derivative financial instruments - liability	0
Derivative financial instruments - asset		0
Deferred stock-based compensation	0	0
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	0	0
Derivative financial instruments - liability	2,328
Derivative financial instruments - asset		276
Deferred stock-based compensation	7,207	7,503
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	0	0
Derivative financial instruments - liability	0
Derivative financial instruments - asset		0
Deferred stock-based compensation	0	0
Government Securities | Fair Value measurements on a recurring basis
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	6,371	6,339
Government Securities | Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Government Securities | Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	6,371	6,339
Government Securities | Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Corporate Bonds | Fair Value measurements on a recurring basis
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,228	6,323
Corporate Bonds | Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Corporate Bonds | Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,228	6,323
Corporate Bonds | Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	$ 0