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SEGMENT INFORMATION (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | $ 182,571,852 us-gaap_Revenues |  | $ 108,999,805 us-gaap_Revenues |  | $ 86,858,401 us-gaap_Revenues |
Total Cost of revenue | 139,308,511 us-gaap_CostOfRevenue |  | 135,103,408 us-gaap_CostOfRevenue |  | 124,290,384 us-gaap_CostOfRevenue |
Gross (loss) profit | 43,263,341 us-gaap_GrossProfit |  | (26,103,603)us-gaap_GrossProfit |  | (37,431,983)us-gaap_GrossProfit |
Polysilicon [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 127,692,325 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 76,721,105 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 73,450,807 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |
Wafer [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 54,879,527 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 32,278,700 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 13,407,594 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |
Operating Segments [Member] | Polysilicon [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 157,117,208 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 89,916,943 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 79,518,146 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |
Total Cost of revenue | 119,703,550 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 98,684,325 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | 110,243,043 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |
Gross (loss) profit | 37,413,658 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | (8,767,382)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | (30,724,897)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |
Operating Segments [Member] | Wafer [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 54,879,527 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 32,278,700 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 13,407,594 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |
Total Cost of revenue | 47,861,811 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 49,614,921 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | 20,114,680 us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |
Gross (loss) profit | 7,017,716 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | (17,336,221)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |  | (6,707,086)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dq_WaferMember |
Elimination [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | (29,424,883)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  | (13,195,838)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  | (6,067,339)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |
Total Cost of revenue | (28,256,850)us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  | (13,195,838)us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  | (6,067,339)us-gaap_CostOfRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |
Gross (loss) profit | (1,168,033)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |
Elimination [Member] | Polysilicon [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | (29,424,883)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | (13,195,838)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |  | (6,067,339)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = dq_PolysiliconMember |
Elimination [Member] | Wafer [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  |  |  |  |  |
Customer I [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | [1] |  | [1] | 21,749,284 us-gaap_Revenues / us-gaap_MajorCustomersAxis = dq_CustomerIMember |
Customer J [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 23,882,302 us-gaap_Revenues / us-gaap_MajorCustomersAxis = dq_CustomerJMember |  | 19,644,488 us-gaap_Revenues / us-gaap_MajorCustomersAxis = dq_CustomerJMember |  |  | [1]
Customer C [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 18,210,196 us-gaap_Revenues / us-gaap_MajorCustomersAxis = dq_CustomerCMember |  |  | [1] |  | [1]
Customer K [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | [1] | $ 13,471,873 us-gaap_Revenues / us-gaap_MajorCustomersAxis = dq_CustomerKMember |  |  | [1]
[1] | Represents less than 10%

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