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Business Combinations - Schedule of Provisional Fair Value of Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Dec. 28, 2025
Sep. 24, 2025
Dec. 29, 2024
SunPower Businesses Acquisition [Member]      
Net assets acquired:      
Cash and cash equivalents $ 1,000    
Accounts receivable 16,614    
Contract assets    
Inventories 48,388    
Prepaid expenses and other current assets 2,219    
Property and equipment, net 5,867    
Operating lease right-of-use assets 2,506    
Other noncurrent assets 541    
Intangibles 15,894    
Deferred revenue (7,361)    
Accounts payable (5,270)    
Accrued expenses and other current liabilities (13,955)    
Operating lease liabilities, noncurrent (2,963)    
Other long-term liabilities (8,980)    
Fair value of net assets acquired 54,500    
Goodwill recognized    
Consideration transferred 54,500    
Total 15,894    
SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member]      
Net assets acquired:      
Total $ 7,094    
Total 10 years    
SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member]      
Net assets acquired:      
Total $ 4,300    
Total 10 years    
SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total $ 4,500    
Total 3 years    
Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total 2 years    
Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member]      
Net assets acquired:      
Total 10 years    
Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member]      
Net assets acquired:      
Total 10 years    
Ambia Energy LLC Acquisition [Member]      
Net assets acquired:      
Total $ 4,300    
Ambia Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member]      
Net assets acquired:      
Total 3,400    
Ambia Energy LLC Acquisition [Member] | Trademarks - Ambia [Member]      
Net assets acquired:      
Total 900    
Provisional fair values [Member] | SunPower Businesses Acquisition [Member]      
Net assets acquired:      
Cash and cash equivalents     $ 1,000
Accounts receivable     11,999
Contract assets     4,615
Inventories     27,706
Prepaid expenses and other current assets     2,219
Property and equipment, net     5,867
Operating lease right-of-use assets     2,506
Other noncurrent assets     541
Intangibles     18,100
Deferred revenue     (7,361)
Accounts payable     (5,270)
Accrued expenses and other current liabilities     (13,955)
Operating lease liabilities, noncurrent     (2,963)
Other long-term liabilities     (8,980)
Fair value of net assets acquired     36,024
Goodwill recognized     18,476
Consideration transferred     54,500
Total     18,100
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member]      
Net assets acquired:      
Total     8,400
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member]      
Net assets acquired:      
Total     5,200
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total     $ 4,500
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member]      
Net assets acquired:      
Accounts receivable 797 $ 257  
Prepaid expenses and other current assets 3,039 387  
Property and equipment, net 241 241  
Operating lease right-of-use assets 313 313  
Other noncurrent assets 135 552  
Intangibles 37,500 25,922  
Contract liabilities (11,673) (11,073)  
Accounts payable (203) (184)  
Accrued expenses and other current liabilities (3,850) (1,322)  
Operating lease liabilities, noncurrent (332) (215)  
Fair value of net assets acquired 25,967 14,878  
Goodwill recognized 31,822 42,911  
Consideration transferred 57,789 57,789  
Total 37,500 25,922  
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total 800 14,216  
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member]      
Net assets acquired:      
Total 30,600 9,279  
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member]      
Net assets acquired:      
Total 6,100 $ 2,427  
Provisional fair values [Member] | Ambia Energy LLC Acquisition [Member]      
Net assets acquired:      
Cash and cash equivalents 1,350    
Accounts receivable 1,368    
Contract assets - unbilled receivables 1,143    
Prepaid expenses and other current assets 797    
Property and equipment, net 2,230    
Intangible assets 4,300    
Operating lease right-of-use assets 2,563    
Other noncurrent assets 182    
Contract liabilities (1,675)    
Accounts payable (2,806)    
Accrued expenses and other current liabilities (2,917)    
Operating lease liabilities, noncurrent (2,702)    
Finance lease liabilities (1,269)    
Fair value of net assets acquired 2,564    
Fair value of common stock issued (classified within Additional paid-in-capital) 16,493    
Goodwill recognized 30,808    
Consideration transferred 33,372    
Fair value of Deferred Ambia Consideration Shares (Accrued expenses and other current liabilities) 16,879    
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member]      
Net assets acquired:      
Cash and cash equivalents    
Accounts receivable 4,615    
Contract assets (4,615)    
Inventories 20,682    
Prepaid expenses and other current assets    
Property and equipment, net    
Operating lease right-of-use assets    
Other noncurrent assets    
Intangibles (2,206)    
Deferred revenue    
Accounts payable    
Accrued expenses and other current liabilities    
Operating lease liabilities, noncurrent    
Other long-term liabilities    
Fair value of net assets acquired 18,476    
Goodwill recognized (18,476)    
Consideration transferred    
Total (2,206)    
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member]      
Net assets acquired:      
Total (1,306)    
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member]      
Net assets acquired:      
Total (900)    
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total    
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member]      
Net assets acquired:      
Accounts receivable 540    
Prepaid expenses and other current assets 2,652    
Property and equipment, net    
Operating lease right-of-use assets    
Other noncurrent assets (417)    
Intangibles 11,578    
Contract liabilities (600)    
Accounts payable (19)    
Accrued expenses and other current liabilities (2,528)    
Operating lease liabilities, noncurrent (117)    
Fair value of net assets acquired 11,089    
Goodwill recognized (11,089)    
Consideration transferred    
Total 11,578    
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member]      
Net assets acquired:      
Total (13,416)    
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member]      
Net assets acquired:      
Total 21,321    
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member]      
Net assets acquired:      
Total $ 3,673    
Measurement period adjustments [Member] | Ambia Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member]      
Net assets acquired:      
Total [1] 1 year    
Measurement period adjustments [Member] | Ambia Energy LLC Acquisition [Member] | Trademarks - Ambia [Member]      
Net assets acquired:      
Total 1 year    
[1] Useful life is based upon customer consumption, expected to occur within one year.