Fair Value Measurements of Financial Instruments - Assets (Details) - USD ($) $ in Millions | Jul. 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) | $ 19.6 | $ 52.3 |
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) | 19.6 | 52.3 |
Derivative financial instruments - liability | | (1) |
Deferred stock-based compensation | (5.5) | (8.1) |
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) | 19.6 | 52.3 |
Derivative financial instruments - liability | | 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 - liability | | (1) |
Deferred stock-based compensation | (5.5) | (8.1) |
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 - liability | | 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 | 5.8 | 5.5 |
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 | 5.8 | 5.5 |
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 | 7.8 |
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 | 7.8 |
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 | (5.1) | (5.1) |
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 | $ (5.1) | $ (5.1) |