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Investments Available for Sale (Tables) | 9 Months Ended
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Sep. 26, 2025
Investments, Debt and Equity Securities [Abstract] |
Summary of Investments Available for Sale and Related Fair Value Measurement | Investments available for sale (“AFS”) and the related fair value measurement consisted of the following (dollars in thousands):
|  | September 26, 2025 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Fair Value Measurements |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Estimated Fair Value |  |  | Level 1 |  |  | Level 2 |
Commercial paper |  | $ | 14,373 |  |  | $ | 2 |  |  | $ | (2 | ) |  | $ | 14,373 |  |  | $ | — |  |  | $ | 14,373 |
Certificates of deposit |  |  | 1,524 |  |  |  | 1 |  |  |  | — |  |  |  | 1,525 |  |  |  | — |  |  |  | 1,525 |
Corporate debt securities |  |  | 607 |  |  |  | — |  |  |  | — |  |  |  | 607 |  |  |  | — |  |  |  | 607 |
Total investments AFS |  | $ | 16,504 |  |  | $ | 3 |  |  | $ | (2 | ) |  | $ | 16,505 |  |  | $ | — |  |  | $ | 16,505 |
|  | December 27, 2024 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Fair Value Measurements |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Estimated Fair Value |  |  | Level 1 |  |  | Level 2 |
Commercial paper |  | $ | 21,466 |  |  | $ | 4 |  |  | $ | (2 | ) |  | $ | 21,468 |  |  | $ | — |  |  | $ | 21,468 |
Certificates of deposit |  |  | 1,997 |  |  |  | — |  |  |  | — |  |  |  | 1,997 |  |  |  | — |  |  |  | 1,997 |
U.S. Treasury securities |  |  | 11,356 |  |  |  | 3 |  |  |  | (4 | ) |  |  | 11,355 |  |  |  | 11,355 |  |  |  | — |
Corporate debt securities |  |  | 51,527 |  |  |  | 14 |  |  |  | (26 | ) |  |  | 51,515 |  |  |  | — |  |  |  | 51,515 |
Total investments AFS |  | $ | 86,346 |  |  | $ | 21 |  |  | $ | (32 | ) |  | $ | 86,335 |  |  | $ | 11,355 |  |  | $ | 74,980 |
Summary of Fair Value of Investments Available for Sale by Contractual Maturity | The following table shows the fair value of investments AFS by contractual maturity (dollars in thousands):
|  | As of September 26, 2025 |
|  | Within one year |  |  | After one year through five years |  |  |  | Total |
Commercial paper |  | $ | 14,373 |  |  | $ | — |  |  |  | $ | 14,373 |
Certificates of deposit |  |  | 1,525 |  |  |  | — |  |  |  |  | 1,525 |
Corporate debt securities |  |  | 607 |  |  |  | — |  |  |  |  | 607 |
Total investments AFS |  | $ | 16,505 |  |  | $ | — |  |  |  | $ | 16,505 |

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- Definition Tabular disclosure 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/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
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