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Segment Information - Schedule of Financial Performance through Reportable Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 28, 2025
Dec. 29, 2024
Residential Solar Installation [Member]      
Segment Reporting Information [Line Items]      
Operating revenues   $ 160,987 $ 67,460
Less:      
Cost of revenues   88,400 [1] 45,266
Sales commissions   26,298 23,388
Sales and marketing   25,154 6,827
General and administrative   58,597 [1] 57,641 [2]
Segment operating income (loss)   (37,462) (65,662)
New Homes Business [Member]      
Segment Reporting Information [Line Items]      
Operating revenues   124,595 41,282
Less:      
Cost of revenues   82,288 [1] 23,974
Sales commissions   5,032 1,202
Sales and marketing   3,253
General and administrative   29,648 [1] 18,953 [2]
Segment operating income (loss)   4,374 (2,847)
Dealer [Member]      
Segment Reporting Information [Line Items]      
Operating revenues   14,418  
Less:      
Cost of revenues [1]   100  
Sales commissions   5,679  
Sales and marketing   623  
General and administrative [1]   1,859  
Segment operating income (loss)   6,157  
Reportable Subsegments [Member]      
Segment Reporting Information [Line Items]      
Operating revenues   300,000 108,742
Gain on troubled debt restructuring     22,337
Less:      
Cost of revenues $ 2,200    
General and administrative 7,000    
Total 9,200    
Segment operating income (loss)   (26,931) (68,509)
Unallocated amounts:      
Interest expense   (25,095) (16,223)
Interest income   3 19
Other non-operating income, net   9,347 7,932
Loss from continuing operations before taxes   $ (42,676) $ (54,444)
Residential Solar Installation [Member]      
Less:      
Cost of revenues 2,000    
General and administrative 5,300    
Total 7,300    
New Homes Business [Member]      
Less:      
Cost of revenues 100    
General and administrative 800    
Total 900    
Dealer [Member]      
Less:      
Cost of revenues 100    
General and administrative 900    
Total $ 1,000    
[1] For the year ended December 28, 2025, depreciation and amortization expense was as follows
[2] For the year ended December 29, 2024, depreciation and amortization expense was $2.6 million and $0.1 million for the Residential Solar Installation and New Homes Business reportable segments, respectively.