v3.26.1
Fair Value Measurements - Schedule of Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 28, 2026
Dec. 28, 2025
Financial Assets    
Financial Assets $ 1,134 $ 3,841
Financial Liabilities    
Financial Liabilities 54,644 132,089
Level 1 [Member]    
Financial Assets    
Financial Assets 1,134 3,841
Financial Liabilities    
Financial Liabilities 1,208 13,315
Level 2 [Member]    
Financial Assets    
Financial Assets
Financial Liabilities    
Financial Liabilities
Level 3 [Member]    
Financial Assets    
Financial Assets
Financial Liabilities    
Financial Liabilities 53,436 118,774
Restricted Cash [Member]    
Financial Assets    
Financial Assets 1,134 3,841
Restricted Cash [Member] | Level 1 [Member]    
Financial Assets    
Financial Assets 1,134 3,841
Restricted Cash [Member] | Level 2 [Member]    
Financial Assets    
Financial Assets
Restricted Cash [Member] | Level 3 [Member]    
Financial Assets    
Financial Assets
July 2024 Notes derivative liability [Member]    
Financial Liabilities    
Financial Liabilities [1] 5,905 19,604
July 2024 Notes derivative liability [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2024 Notes derivative liability [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2024 Notes derivative liability [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 5,905 19,604
July 2024 Notes derivative liability – related parties [Member]    
Financial Liabilities    
Financial Liabilities [1] 3,800 12,615
July 2024 Notes derivative liability – related parties [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2024 Notes derivative liability – related parties [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2024 Notes derivative liability – related parties [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 3,800 12,615
September 2024 Notes derivative liability [Member]    
Financial Liabilities    
Financial Liabilities [1] 6,261 37,930
September 2024 Notes derivative liability [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2024 Notes derivative liability [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2024 Notes derivative liability [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 6,261 37,930
September 2024 Notes derivative liability – related parties [Member]    
Financial Liabilities    
Financial Liabilities [1] 1,667 5,870
September 2024 Notes derivative liability – related parties [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2024 Notes derivative liability – related parties [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2024 Notes derivative liability – related parties [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 1,667 5,870
July 2025 Note derivative liability– related party [Member]    
Financial Liabilities    
Financial Liabilities [1] 981 3,246
July 2025 Note derivative liability– related party [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2025 Note derivative liability– related party [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
July 2025 Note derivative liability– related party [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 981 3,246
September 2025 Notes derivative liability [Member]    
Financial Liabilities    
Financial Liabilities [1] 4,380 14,756
September 2025 Notes derivative liability [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2025 Notes derivative liability [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
September 2025 Notes derivative liability [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 4,380 14,756
November 2025 Note derivative liability – related party [Member]    
Financial Liabilities    
Financial Liabilities [1] 450 1,488
November 2025 Note derivative liability – related party [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]
November 2025 Note derivative liability – related party [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]
November 2025 Note derivative liability – related party [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 450 1,488
January 2026 Note derivative liability – related party [Member]    
Financial Liabilities    
Financial Liabilities 622  
January 2026 Note derivative liability – related party [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities  
January 2026 Note derivative liability – related party [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities  
January 2026 Note derivative liability – related party [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 622  
$1.9 Million Note [Member]    
Financial Liabilities    
Financial Liabilities 1,325  
$1.9 Million Note [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities  
$1.9 Million Note [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities  
$1.9 Million Note [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 1,325  
March 2026 Bridge Note [Member]    
Financial Liabilities    
Financial Liabilities 2,209  
March 2026 Bridge Note [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities  
March 2026 Bridge Note [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities  
March 2026 Bridge Note [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 2,209  
May 2026 Note derivative liability [Member]    
Financial Liabilities    
Financial Liabilities [1] 1,163  
May 2026 Note derivative liability [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities [1]  
May 2026 Note derivative liability [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities [1]  
May 2026 Note derivative liability [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities [1] 1,163  
Forward purchase agreement liabilities [Member]    
Financial Liabilities    
Financial Liabilities 9,274 3,965
Forward purchase agreement liabilities [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities
Forward purchase agreement liabilities [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Forward purchase agreement liabilities [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 9,274 3,965
Private placement warrants [Member]    
Financial Liabilities    
Financial Liabilities 878 1,692
Private placement warrants [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities
Private placement warrants [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Private placement warrants [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 878 1,692
Working capital warrants [Member]    
Financial Liabilities    
Financial Liabilities 100 194
Working capital warrants [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities
Working capital warrants [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Working capital warrants [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 100 194
Public warrants [Member]    
Financial Liabilities    
Financial Liabilities 1,208 2,475
Public warrants [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities 1,208 2,475
Public warrants [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Public warrants [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities
Deferred Sunder Consideration Shares [Member]    
Financial Liabilities    
Financial Liabilities 6,539 10,840
Deferred Sunder Consideration Shares [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities 10,840
Deferred Sunder Consideration Shares [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Deferred Sunder Consideration Shares [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities 6,539
Deferred Ambia Consideration Shares [Member]    
Financial Liabilities    
Financial Liabilities 7,882 16,879
Deferred Ambia Consideration Shares [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities
Deferred Ambia Consideration Shares [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities
Deferred Ambia Consideration Shares [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities $ 7,882 16,879
SAFE Agreement with related party [Member]    
Financial Liabilities    
Financial Liabilities   535
SAFE Agreement with related party [Member] | Level 1 [Member]    
Financial Liabilities    
Financial Liabilities  
SAFE Agreement with related party [Member] | Level 2 [Member]    
Financial Liabilities    
Financial Liabilities  
SAFE Agreement with related party [Member] | Level 3 [Member]    
Financial Liabilities    
Financial Liabilities   $ 535
[1] The derivative liabilities are associated with the Company’s outstanding senior unsecured convertible notes with stated interest rates of 7.0% (the “September 2024 Notes” and “September 2025 Notes”) and 12.0% (the “July 2024 Notes”, “July 2025 Note”, “November 2025 Note” and “January 2026 Note”), and outstanding senior secured convertible notes with stated interest rates of 10.0% (the “May 2026 Note”) all of which are defined in Note 9 – Borrowings and Derivative Liabilities.