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Fair Value of Financial Instruments - Valuation of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 28, 2024 | Dec. 30, 2023
--- | --- | ---
Fair Value of Financial Instruments |  |
Cash equivalents | $ 211,220 | $ 137,195
Short-term investments | 66,596 | 211,720
Total | 277,816 | 348,915
Money market funds |  |
Fair Value of Financial Instruments |  |
Cash equivalents | 211,220 | 137,195
Corporate debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | 14,281 | 130,047
Government debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | 52,315 | 81,673
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value of Financial Instruments |  |
Cash equivalents | 211,220 | 137,195
Short-term investments | 0 | 0
Total | 211,220 | 137,195
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds |  |
Fair Value of Financial Instruments |  |
Cash equivalents | 211,220 | 137,195
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Government debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value of Financial Instruments |  |
Cash equivalents | 0 | 0
Short-term investments | 66,596 | 211,720
Total | 66,596 | 211,720
Significant Other Observable Inputs (Level 2) | Money market funds |  |
Fair Value of Financial Instruments |  |
Cash equivalents | 0 | 0
Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | 14,281 | 130,047
Significant Other Observable Inputs (Level 2) | Government debt securities |  |
Fair Value of Financial Instruments |  |
Short-term investments | $ 52,315 | $ 81,673

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- Definition Fair value portion 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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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