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Fair Value Measurements of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 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) $ 17.4 $ 52.3
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) 17.4 52.3
Derivative financial instruments - liability   (1.0)
Deferred stock-based compensation (4.7) (8.1)
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 debt securities 5.6 5.5
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 debt securities 7.2 7.8
Fair Value measurements on a recurring basis | Put option liability    
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instruments - liability (5.1) (5.1)
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) 17.4 52.3
Derivative financial instruments - liability   0.0
Deferred stock-based compensation 0.0 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 debt securities 0.0 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 debt securities 0.0 0.0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Put option liability    
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instruments - liability 0.0 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 0.0
Derivative financial instruments - liability   (1.0)
Deferred stock-based compensation (4.7) (8.1)
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 debt securities 5.6 5.5
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 debt securities 7.2 7.8
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Put option liability    
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instruments - liability 0.0 0.0
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 0.0
Derivative financial instruments - liability   0.0
Deferred stock-based compensation 0.0 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 debt securities 0.0 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 debt securities 0.0 0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Put option liability    
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instruments - liability $ (5.1) $ (5.1)