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DEBT AND CREDIT SOURCES - 2027 Convertible Notes (Details)
12 Months Ended
Aug. 17, 2022
USD ($)
d
$ / shares
shares
Jul. 17, 2020
d
Dec. 31, 2023
USD ($)
Jan. 01, 2023
USD ($)
Debt Instrument [Line Items]        
Threshold trading days | d   60    
Convertible debt [1]     $ 385,558,000 $ 378,610,000
Unamortized debt issuance cost     16,100,000 19,700,000
2027 Notes | Convertible debt        
Debt Instrument [Line Items]        
Convertible notes (Note 11) $ 207,000,000   207,000,000 207,000,000
Stated percentage 7.50%      
Conversion ratio percentage 0.97      
Conversion price (USD per share) | $ / shares $ 23.13      
Conversion ratio, number of shares (in shares) | shares 43.2301      
Conversion ratio, principal amount $ 1,000      
Threshold percentage of stock price trigger 130.00%      
Threshold trading days | d 30      
Convertible debt     190,900,000 187,300,000
2027 Notes | Convertible debt | Level 2        
Debt Instrument [Line Items]        
Fair value of debt     148,400,000 199,500,000
If-converted value (below) in excess of principal     $ (142,800,000) $ (63,300,000)
2027 Notes | Convertible debt | Minimum        
Debt Instrument [Line Items]        
Threshold trading days | d 20      
2027 Notes | Convertible debt | Rate when paid in cash        
Debt Instrument [Line Items]        
Stated percentage 3.50%      
2027 Notes | Convertible debt | Rate for form of payment elected by company        
Debt Instrument [Line Items]        
Stated percentage 4.00%      
[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).