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Borrowings and Derivative Liabilities - Schedule of Fair Value of the Derivative Liability (Details) - USD ($) $ in Thousands | Mar. 29, 2026 | Dec. 28, 2025 | Dec. 29, 2024
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Convertible July 2024 Notes [Member] | July 2024 Notes [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | $ 55,566 | [1] | $ 56,801 | [1] | $ 59,587
Less Unamortized debt discount | (15,709) |  | (16,201) |  | (16,990)
Total carrying amount | 39,857 |  | 40,600 |  | 42,597
Convertible July 2025 Note [Member] | July 2025 Note – related party [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | 5,000 |  | 5,000 |  | 5,000
Less Unamortized debt discount | (3,481) |  | (3,557) |  | (3,557)
Total carrying amount | 1,519 |  | 1,443 |  | 1,443
Convertible July 2025 Note [Member] | November 2025 Note – related party [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount |  |  |  |  | 2,000
Less Unamortized debt discount |  |  |  |  | (1,509)
Total carrying amount |  |  |  |  | 491
Convertible November 2025 Note [Member] | November 2025 Note – related party [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | 2,000 |  |  |  | 2,000
Less Unamortized debt discount | (1,483) |  |  |  | (1,509)
Total carrying amount | 517 |  |  |  | 491
Convertible January 2026 Note [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | 3,300 |  |  |  |
Less Unamortized debt discount | (2,262) |  |  |  |
Total carrying amount | 1,038 |  |  |  |
Convertible September 2024 Notes [Member] | September 2024 Notes [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | 62,543 |  | 65,293 |  | 79,800
Less Unamortized debt discount | (43,797) |  | (48,615) |  | (73,688)
Total carrying amount | 18,746 |  | 16,678 |  | $ 6,112
Convertible September 2025 Notes [Member] | September 2025 Notes [Member] |  |  |  |  |
Schedule of Fair Value of the Derivative Liability [Line Item] |  |  |  |  |
Principal amount | 22,000 |  | 22,000 |  |
Less Unamortized debt discount | (18,425) |  | (18,646) |  |
Total carrying amount | $ 3,575 |  | $ 3,354 |  |
[1] | Includes capitalized coupon interest of $7.5 million and $8.6 million as of March 29, 2026 and December 28, 2025, respectively, and capitalized contingent interest of $2.0 million and $2.2 million as of March 29, 2026 and December 28, 2025, respectively.

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