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TRANSACTIONS WITH SUNPOWER AND TOTALENERGIES - Transactions with Total (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Jan. 01, 2023
Jan. 02, 2022
Related Party Transaction [Line Items]      
Accounts receivable, net $ 62,700    
Other receivables 14,278 $ 19,394  
Accounts payable [1] 153,020 247,870  
Contract liabilities, current portion [1] 134,171 139,267  
Contract liabilities, net of current portion [1] 113,564 161,678  
Related party      
Related Party Transaction [Line Items]      
Revenue 206,000 283,300 $ 225,900
Related party | TotalEnergies      
Related Party Transaction [Line Items]      
Accounts receivable, net 13,390 10,732  
Other receivables 794 0  
Accounts payable 232 8  
Contract liabilities, current portion 218 58,852  
Contract liabilities, net of current portion 0 4,319  
Contract with customer, refund liability 18,229 22,146  
Revenue $ 99,694 $ 76,216 $ 14,733
[1] We have related-party balances for transactions with TCL Zhonghuan Renewable Energy Technology Co. Ltd, SunPower and TotalEnergies S.E. and its affiliates as well as unconsolidated entities in which we have a direct
equity investment. These related-party balances are recorded within the “Accounts receivable, net,” “Prepaid expenses and other current assets,” “Other long-term assets,” “Accounts payable,” “Accrued liabilities,” “Contract liabilities, current portion,” “Contract liabilities, net of current portion,” “Convertible debt,” and “Other long-term liabilities” financial statement line items in our Consolidated Balance Sheets (see Note 3, Note 4, Note 6, Note 10 and Note 11).