Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	$ 52,270	$ 116,120
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)	52,270	116,120
Derivative financial instruments - liability	(959)	(2,328)
Deferred stock-based compensation	(8,079)	(7,207)
Fair Value measurements on a recurring basis | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	5,489	6,371
Fair Value measurements on a recurring basis | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,816	7,228
Fair Value measurements on a recurring basis | Put Option
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(5,100)
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)	52,270	116,120
Derivative financial instruments - liability	0	0
Deferred stock-based compensation	0	0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Put Option
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	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	(959)	(2,328)
Deferred stock-based compensation	(8,079)	(7,207)
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	5,489	6,371
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,816	7,228
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Put Option
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0
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	0
Deferred stock-based compensation	0	0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	$ 0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Put Option
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	$ (5,100)