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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Revenue Recognition) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
SUMMARY OF PRINCIPAL ACCOUNTING POLICIES      
Revenue from polysilicon sales $ 1,029,080 $ 2,307,695 $ 4,608,350
Domestic sales      
SUMMARY OF PRINCIPAL ACCOUNTING POLICIES      
Revenue from polysilicon sales 1,013,869 2,279,756 $ 4,608,350
Export sales      
SUMMARY OF PRINCIPAL ACCOUNTING POLICIES      
Revenue from polysilicon sales $ 15,211 $ 27,939