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Borrowings and Derivative Liabilities - Schedule of Interest Expense and Amortization of Debt Discount Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 29, 2024
Dec. 29, 2024
12% Senior Unsecured Convertible Notes [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense $ 1,410 $ 849 $ 4,182 $ 849 $ 2,800
Amortization of debt discount 1,072 864 3,028 864  
Total 2,482 1,713 7,210 1,713  
7.0% senior unsecured convertible notes [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense 1,431 52 4,253 52  
Amortization of debt discount 3,790 454 11,152 454  
Total 5,221 506 15,405 506  
September 2025 Notes [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense 34 34  
Amortization of debt discount 26 26  
Total 60 60  
Related Party [Member] | 12% Senior Unsecured Convertible Notes [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense 550 546 1,932 546  
Amortization of debt discount 421 526 1,391 526  
Total 971 1,072 3,323 1,072  
Related Party [Member] | July 2025 Note – related party [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense 138 138  
Amortization of debt discount 53 53  
Total 191 191  
Related Party [Member] | 7.0% senior unsecured convertible notes [Member]          
Schedule of Interest Expense and Amortization of Debt Discount Cost [Line Items]          
Interest expense 143 6 425 6  
Amortization of debt discount 422 54 1,253 54  
Total $ 565 $ 60 $ 1,678 $ 60