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EXIT and DISPOSAL ACTIVITIES (Details) | 12 Months Ended |  |  |  | 6 Months Ended | 12 Months Ended |  |
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2014 Wages [Member] USD ($) | Dec. 31, 2014 Electricity fees [Member] USD ($) | Dec. 31, 2014 Selling, general and administrative expenses [Member] USD ($) | Dec. 31, 2013 Carrying Value [Member] USD ($) | Dec. 31, 2014 Significant Production Assets [Member] Carrying Value [Member] USD ($) | Dec. 31, 2013 Significant Production Assets [Member] Carrying Value [Member] USD ($) | Sep. 28, 2012 Nanjing Daqo [Member] USD ($) | Dec. 31, 2014 Nanjing Daqo [Member] USD ($) | Dec. 31, 2013 Nanjing Daqo [Member] USD ($) | Dec. 31, 2012 Nanjing Daqo [Member] USD ($) | Sep. 28, 2012 Nanjing Daqo [Member] CNY | Mar. 31, 2012 Nanjing Daqo [Member] USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest held |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |  |  |  |
Total consideration received |  |  |  |  |  |  |  |  |  | $ 9,900,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |  |  | 62,000,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |
Total (loss) discontinued operations |  |  | (2,392,228)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax |  |  |  |  |  |  |  |  |  | (2,392,228)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Gain on disposition |  |  | 1,099,299 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax |  |  |  |  |  |  |  |  |  | 1,099,299 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Net assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 us-gaap_AssetsNet / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember
Reclassification of foreign currency translation gain from other comprehensive income |  |  | 1,099,299 us-gaap_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLosses |  |  |  |  |  |  |  |  |  | 1,099,299 us-gaap_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLosses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Total cash consideration received |  |  |  |  |  |  |  |  |  |  |  |  | 4,778,657 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Operating results reported as discontinued operations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 6,454,830 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Operating costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  | (9,946,357)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Loss from discontinued operations before income taxes |  |  |  |  |  |  |  |  |  | (2,100,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |  | (3,491,527)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  | (3,491,527)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = dq_NanjingDaqoMember |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets |  |  |  |  |  |  | 307,942,362 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 116,100,000 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis = dq_SignificantProductionAssetsMember | 144,700,000 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis = dq_SignificantProductionAssetsMember |  |  |  |  |  |
Impairment charge |  | 158,424,827 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | 42,754,481 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse |  |  |  |  |  |  |  |  |  |  |  |
Employee termination costs | 800,000 us-gaap_SeveranceCosts1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets relocated |  |  |  |  |  |  |  | 46,100,000 dq_PropertyPlantAndEquipmentRelocated / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis = dq_SignificantProductionAssetsMember |  |  |  |  |  |  |
Carrying value of assets yet to be relocated |  |  |  |  |  |  |  | 70,000,000 dq_PropertyPlantAndEquipmentYetToBeRelocated / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis = dq_SignificantProductionAssetsMember |  |  |  |  |  |  |
Relocation costs | 500,000 us-gaap_BusinessExitCosts1 |  |  |  |  | 800,000 us-gaap_BusinessExitCosts1 / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |  |  |  |  |  |  |  |
Expected relocation costs | 2,300,000 us-gaap_RestructuringAndRelatedCostExpectedCost1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maintenance expenses | $ 500,000 us-gaap_RestructuringCharges |  |  | $ 300,000 us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherExpenseMember | $ 200,000 us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = dq_ElectricityFeesMember |  |  |  |  |  |  |  |  |  |

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