Fair Value Measurements of Financial Instruments - Assets (Details) - USD ($) $ in Thousands	Apr. 02, 2022	Jan. 01, 2022
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	$ 23,483	$ 52,270
Fair value, measurements, recurring
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	23,483	52,270
Derivative financial instruments - asset	326
Derivative financial instruments - liability	(90)	(959)
Deferred stock-based compensation	(6,098)	(8,079)
Fair value, measurements, recurring | 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)	23,483	52,270
Derivative financial instruments - asset	0
Derivative financial instruments - liability	0	0
Deferred stock-based compensation	0	0
Fair value, measurements, recurring | 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 - asset	326
Derivative financial instruments - liability	(90)	(959)
Deferred stock-based compensation	(6,098)	(8,079)
Fair value, measurements, recurring | 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 - asset	0
Derivative financial instruments - liability	0	0
Deferred stock-based compensation	0	0
Fair value, measurements, recurring | Government securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	5,403	5,489
Fair value, measurements, recurring | Government securities | 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 debt securities	0	0
Fair value, measurements, recurring | Government securities | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	5,403	5,489
Fair value, measurements, recurring | Government securities | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value, measurements, recurring | Corporate bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7,677	7,816
Fair value, measurements, recurring | Corporate bonds | 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 debt securities	0	0
Fair value, measurements, recurring | Corporate bonds | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7,677	7,816
Fair value, measurements, recurring | Corporate bonds | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value, measurements, recurring | Put option
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(5,100)	(5,100)
Fair value, measurements, recurring | Put option | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0	0
Fair value, measurements, recurring | Put option | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0	0
Fair value, measurements, recurring | Put option | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	$ (5,100)	$ (5,100)