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BORROWINGS (Short-Term Borrowings) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Short-term Debt [Line Items]      
Short-term bank borrowings $ 34,135,224 $ 43,807,350  
Interest rate on short-term bank borrowings 5.00% 5.10% 5.00%
Daqo Group and its related parties [Member]      
Short-term Debt [Line Items]      
Short-term bank borrowings $ 29,076,000 $ 43,807,350  
Certificate of deposit [Member]      
Short-term Debt [Line Items]      
Short-term bank borrowings $ 5,059,224 $ 0