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Investments (Tables) | 9 Months Ended
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Sep. 28, 2024
Amortized Cost and Fair Value of Available-for-Sale Investments | The amortized cost and fair values of available-for-sale investments are as follows at September 28, 2024 and December 30, 2023 (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
September 28, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market investments |  | $ | 14,998 |  |  | $ | — |  |  | $ | — |  |  | $ | 14,998 |
Asset-backed securities |  |  | 17,535 |  |  |  | 21 |  |  |  | 1,563 |  |  |  | 15,993 |
Corporate bonds, commercial paper and direct obligations of government agencies |  |  | 118,857 |  |  |  | 998 |  |  |  | 1,987 |  |  |  | 117,868 |
Total |  | $ | 151,390 |  |  | $ | 1,019 |  |  | $ | 3,550 |  |  | $ | 148,859 |
December 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market investments |  | $ | 16,832 |  |  | $ | — |  |  | $ | — |  |  | $ | 16,832 |
Asset-backed securities |  |  | 16,543 |  |  |  | — |  |  |  | 2,236 |  |  |  | 14,307 |
Corporate bonds, commercial paper and direct obligations of government agencies |  |  | 118,481 |  |  |  | 279 |  |  |  | 4,384 |  |  |  | 114,376 |
U.S. Treasury obligations |  |  | 6,287 |  |  |  | 2 |  |  |  | 43 |  |  |  | 6,246 |
Total |  | $ | 158,143 |  |  | $ | 281 |  |  | $ | 6,663 |  |  | $ | 151,761 |
Schedule of Unrealized Loss on Available-for-Sale Investments | For those available-for-sale investments with unrealized losses at September 28, 2024 and December 30, 2023, the following table summarizes the duration of the unrealized loss (in thousands):
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
September 28, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities |  | $ | — |  |  | $ | — |  |  | $ | 13,107 |  |  | $ | 1,563 |  |  | $ | 13,107 |  |  | $ | 1,563 |
Corporate bonds, commercial paper, and direct obligations of government agencies |  |  | — |  |  |  | — |  |  |  | 65,324 |  |  |  | 1,987 |  |  |  | 65,324 |  |  |  | 1,987 |
Total |  | $ | — |  |  | $ | — |  |  | $ | 78,431 |  |  | $ | 3,550 |  |  | $ | 78,431 |  |  | $ | 3,550 |
December 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities |  | $ | — |  |  | $ | — |  |  | $ | 14,307 |  |  | $ | 2,236 |  |  | $ | 14,307 |  |  | $ | 2,236 |
Corporate bonds, commercial paper, and direct obligations of government agencies |  |  | 3,506 |  |  |  | 42 |  |  |  | 86,841 |  |  |  | 4,342 |  |  |  | 90,347 |  |  |  | 4,384 |
U.S. Treasury obligations |  |  | — |  |  |  | — |  |  |  | 2,305 |  |  |  | 43 |  |  |  | 2,305 |  |  |  | 43 |
Total |  | $ | 3,506 |  |  | $ | 42 |  |  | $ | 103,453 |  |  | $ | 6,621 |  |  | $ | 106,959 |  |  | $ | 6,663 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
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