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Investments Available for Sale (Tables) | 6 Months Ended
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Jun. 27, 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):
|  | June 27, 2025 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Fair Value Measurements |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Estimated Fair Value |  |  | Level 1 |  |  | Level 2 |
Commercial paper |  | $ | 4,153 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 4,154 |  |  | $ | — |  |  | $ | 4,154 |
Certificates of deposit |  |  | 1,507 |  |  |  | — |  |  |  | — |  |  |  | 1,507 |  |  |  | — |  |  |  | 1,507 |
U.S. Treasury securities |  |  | 999 |  |  |  | — |  |  |  | — |  |  |  | 999 |  |  |  | 999 |  |  |  | — |
Corporate debt securities |  |  | 16,096 |  |  |  | 1 |  |  |  | (5 | ) |  |  | 16,092 |  |  |  | — |  |  |  | 16,092 |
Total investments AFS |  | $ | 22,755 |  |  | $ | 2 |  |  | $ | (5 | ) |  | $ | 22,752 |  |  | $ | 999 |  |  | $ | 21,753 |
|  | 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 June 27, 2025 |
|  | Within one year |  |  | After one year through five years |  |  |  | Total |
Commercial paper |  | $ | 4,154 |  |  | $ | — |  |  |  | $ | 4,154 |
Certificates of deposit |  |  | 1,507 |  |  |  | — |  |  |  |  | 1,507 |
U.S. Treasury securities |  |  | 999 |  |  |  | — |  |  |  |  | 999 |
Corporate debt securities |  |  | 16,092 |  |  |  | — |  |  |  |  | 16,092 |
Total investments AFS |  | $ | 22,752 |  |  | $ | — |  |  |  | $ | 22,752 |

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