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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)
Total
Ordinary shares [Member]
Treasury stock [Member]
Additional paid in capital [Member]
Accumulated Loss [Member]
Accumulated other comprehensive income [Member]
Noncontrolling interest [Member]
Balance at Dec. 31, 2011 $ 452,026,227us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 17,571us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
   $ 142,511,581us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 150,204,956us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 18,444,123us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ 140,847,996us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Balance, shares at Dec. 31, 2011   175,714,103us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Net (loss) income (115,637,415)us-gaap_ProfitLoss          (111,928,941)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
   (3,708,474)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Other comprehensive income 3,838,790us-gaap_OtherComprehensiveIncomeLossNetOfTax             2,206,182us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
1,632,608us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Share-based compensation 2,249,834us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       2,249,834us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Stock Repurchases (500,724)us-gaap_TreasuryStockValueAcquiredParValueMethod (283)us-gaap_TreasuryStockValueAcquiredParValueMethod
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
(494,928)us-gaap_TreasuryStockValueAcquiredParValueMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(5,513)us-gaap_TreasuryStockValueAcquiredParValueMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Stock Repurchases, shares   (2,836,670)us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Disposal of Nanjing Daqo New Energy Co., Ltd (1,099,299)us-gaap_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLosses            (1,099,299)us-gaap_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLosses
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Balance at Dec. 31, 2012 340,877,413us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 17,288us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
(494,928)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
144,755,902us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
38,276,015us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
19,551,006us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
138,772,130us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Balance, shares at Dec. 31, 2012   172,877,433us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Net (loss) income (221,090,508)us-gaap_ProfitLoss          (70,943,484)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
   (150,147,024)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Other comprehensive income 5,543,033us-gaap_OtherComprehensiveIncomeLossNetOfTax             4,148,190us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
1,394,843us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Share-based compensation 1,881,401us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       1,881,401us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Deconsolidation of Daqo New Material Co., Ltd. 9,980,051us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation                9,980,051us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Options Exercised 135,171us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 55us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
96,256us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
38,860us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Options Exercised, shares   550,420us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Balance at Dec. 31, 2013 137,326,561us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 17,343us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
(398,672)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
146,676,163us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(32,667,469)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
23,699,196us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Balance, shares at Dec. 31, 2013   173,427,853us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Net (loss) income 16,649,176us-gaap_ProfitLoss          16,649,176us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
     
Other comprehensive income (3,662,013)us-gaap_OtherComprehensiveIncomeLossNetOfTax             (3,662,013)us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Share-based compensation 1,792,819us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       1,792,819us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Follow-on equity offering, net of issuance costs 54,624,447us-gaap_StockIssuedDuringPeriodValueOther 5,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
   54,619,447us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Follow-on equity offering, net of issuance costs, shares   50,000,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Options Exercised 37,080us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 15us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
   37,065us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Options Exercised, shares   150,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
         
Balance at Dec. 31, 2014 $ 206,768,070us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 22,358us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember
$ (398,672)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ 203,125,494us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (16,018,293)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 20,037,183us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Balance, shares at Dec. 31, 2014   223,577,853us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= dq_CommonStockOutstandingMember