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FINANCIAL STATEMENT SCHEDULE I (STATEMENT OF CASH FLOWS) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating activities: |  |  |
Net income (loss) | $ 16,649,176 us-gaap_NetIncomeLoss | $ (70,943,484)us-gaap_NetIncomeLoss | $ (111,928,941)us-gaap_NetIncomeLoss
Share-based compensation | 1,792,819 us-gaap_ShareBasedCompensation | 1,881,401 us-gaap_ShareBasedCompensation | 2,249,834 us-gaap_ShareBasedCompensation
Adjustments to reconcile net income to net cash used in operating activities: |  |  |
Prepaid expenses and other current assets | 10,217,835 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 29,616 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (15,042,913)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Amount due from related party | 2,193,604 us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent | (6,853,965)us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent | 8,418,601 us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent
Net cash (used in) provided by operating activities | 45,619,729 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | (16,525,817)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | (10,307,234)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing activities: |  |  |
Net cash used in investing activities | (90,589,032)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (30,696,113)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (102,922,470)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing activities: |  |  |
Repurchase of ordinary shares |  |  | (500,724)us-gaap_PaymentsForRepurchaseOfCommonStock
Proceeds from follow-on equity offering | 58,000,000 us-gaap_ProceedsFromIssuanceOfCommonStock |  |
Insurance cost for follow-on equity offering | (3,375,553)us-gaap_PaymentsOfStockIssuanceCosts |  |
Proceeds from options exercised | 37,080 us-gaap_ProceedsFromStockOptionsExercised | 135,171 us-gaap_ProceedsFromStockOptionsExercised |
Net cash provided by financing activities | 44,271,754 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 48,826,684 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 27,143,830 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net (decrease) increase in cash and cash equivalents | (762,601)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 1,152,060 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (86,018,074)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at the beginning of the year | 7,831,084 us-gaap_CashAndCashEquivalentsAtCarryingValue | 6,679,024 us-gaap_CashAndCashEquivalentsAtCarryingValue | 92,697,098 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at the end of the year | 7,068,483 us-gaap_CashAndCashEquivalentsAtCarryingValue | 7,831,084 us-gaap_CashAndCashEquivalentsAtCarryingValue | 6,679,024 us-gaap_CashAndCashEquivalentsAtCarryingValue
Parent Company [Member] |  |  |
Operating activities: |  |  |
Net income (loss) | 16,649,176 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (70,943,484)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (111,928,941)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Share of results of subsidiaries | (19,391,427)us-gaap_IncomeLossFromSubsidiariesBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 67,890,514 us-gaap_IncomeLossFromSubsidiariesBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 108,228,045 us-gaap_IncomeLossFromSubsidiariesBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Share-based compensation | 1,792,819 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,881,401 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,249,834 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Adjustments to reconcile net income to net cash used in operating activities: |  |  |
Prepaid expenses and other current assets | (27,195)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 344,717 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (31,207)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Changes in other current liabilities | (26,901)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 137,390 us-gaap_IncreaseDecreaseInOtherCurrentLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 214,231 us-gaap_IncreaseDecreaseInOtherCurrentLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Amount due from related party | 286,526 us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (210,523)us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash (used in) provided by operating activities | (717,002)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (689,462)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,478,561)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing activities: |  |  |
Capital contributed to subsidiaries | (54,638,421)dq_CapitalContributedToSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (4,811,175)dq_CapitalContributedToSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash collected from subsidiaries when liquidation |  | 71,503 us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4,390,250 us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Disposition of Nanjing Daqo |  |  | 4,778,657 us-gaap_ProceedsFromDivestitureOfBusinesses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash used in investing activities | (54,638,421)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 71,503 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4,357,732 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing activities: |  |  |
Repurchase of ordinary shares |  |  | (500,724)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Proceeds from follow-on equity offering | 58,000,000 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Insurance cost for follow-on equity offering | (3,375,553)us-gaap_PaymentsOfStockIssuanceCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Proceeds from options exercised | 37,080 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 135,171 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Net cash provided by financing activities | 54,661,527 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 135,171 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (500,724)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (decrease) increase in cash and cash equivalents | (693,896)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (482,788)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,378,447 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at the beginning of the year | 5,187,046 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,669,834 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,291,387 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at the end of the year | 4,493,150 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,187,046 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,669,834 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Supplemental disclosure of cash flow information: |  |  |
Total consideration |  |  | 9,888,742 dq_SupplementalCashFlowInformationDivestituresConsiderationReceived / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Less: amount due from Daqo Group |  |  | (5,110,085)us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1 / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total cash consideration received |  |  | $ 4,778,657 us-gaap_ProceedsFromDivestitureOfBusinesses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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