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Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Jan. 01, 2022
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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)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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