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Capital Stock - Schedule of Reserved Shares of Common Stock (Details) - shares | Sep. 28, 2025 | Dec. 29, 2024 | Dec. 31, 2023
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Schedule of Reserved Shares of Common Stock [Line Items] |  |  |
Common stock warrants |  | 31,670,265 | 27,637,266
Employee stock purchase plan |  | 2,628,996 | 2,628,996
Stock options and RSUs, issued and outstanding |  | 11,979,368 | 11,774,743
Stock options and RSUs, authorized for future issuance |  | 2,577,895 | 3,850,462
SAFE Agreement |  | 2,750,000 |
Forward purchase agreements |  | 6,720,000 |
Convertible notes |  | 58,579,636 |
Total shares reserved | 153,884,960 | 116,906,160 | 45,891,467

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