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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Additional Information) (Details) - USD ($)
 1 Months Ended 12 Months Ended
Feb. 28, 2015
May. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Basis of presentation            
Working capital     $ (186,600,000)      
Cash and cash equivalents     14,490,011 $ 7,068,483 $ 7,831,084 $ 6,679,024
Short-term bank borrowings, including current portion of long-term bank borrowings     123,936,995 159,803,876    
Capital commitments relating to purchases of property, plant and equipment     15,500,000      
Bank accepted note facilities     $ 22,600,000      
Consecutive years in which net income and positive cash flow from operations generated     2 years      
Amounts due from related parties     $ 284,633 9,986,968    
Current portion of long-term debt     51,576,265 69,360,869    
Follow-on equity offering, net of issuance costs $ 28,000,000 $ 54,600,000 27,996,959 54,624,447    
Net income     13,047,584 16,649,176 (221,090,508)  
Cash flow from operations     66,426,213 45,619,729 (16,525,817)  
Restricted cash            
Restricted cash     19,062,714 22,169,236    
Inventories            
Inventory write-down     62,422 175,568 29,905,734  
Prepaid land use rights            
Lease Expenses     595,716 $ 628,052 781,706  
Impairment of long-lived assets            
Long-lived asset impairment     1,622,588 158,424,827  
Shipping and handling            
Shipping and handling costs     2,708,962 $ 2,054,786 1,901,384  
Government subsidies            
Unrestricted cash government subsidies     3,578,865 926,173 5,249,788  
Government grants related to assets     690,889 113,735 1,172,160  
Foreign currency translation            
Aggregate amount of cash and cash equivalents and restricted cash denominated in RMB     30,891,550 $ 24,356,970    
Noncontrolling interest            
Noncontrolling interest     1,302,027    
Treasury Stock            
Share repurchase program, authorized amount         $ 5,000,000  
Purchase price of treasury stock     1,350,164  
Daqo Group [Member]            
Basis of presentation            
Capital commitments relating to purchases of property, plant and equipment     $ 46,400,000      
Amounts due from related parties     $ 5,110,085    
Common Stock Outstanding [Member]            
Basis of presentation            
Follow-on equity offering, net of issuance costs     $ 3,850 $ 5,000    
Net income      
Treasury Stock            
Number of shares repurchased     2,356,900