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DEBT AND CREDIT SOURCES - Interest Expense Arising From The 2027 Convertible Notes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Jan. 01, 2023
Jan. 02, 2022
Debt Instrument [Line Items]      
Contractual interest expense [1] $ 42,438 $ 30,343 $ 28,138
2027 Notes | Convertible debt      
Debt Instrument [Line Items]      
Amortization of debt issuance costs and debt discount 3,514 1,230 0
2027 Notes | Convertible debt | Related party      
Debt Instrument [Line Items]      
Contractual interest expense $ 15,525 $ 5,822 $ 0
[1] We have related-party 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 transactions are recorded within the “Revenue,” “Cost of revenue,” “Operating expenses: Research and development and Sales, general and administrative,” and “Other expense, net: Interest expense” financial statement line items in our Consolidated Statements of Operations (see Note 3, Note 4 and Note 10).