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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 $ 182,571,852us-gaap_Revenues $ 108,999,805us-gaap_Revenues $ 86,858,401us-gaap_Revenues
Total Cost of revenue 139,308,511us-gaap_CostOfRevenue 135,103,408us-gaap_CostOfRevenue 124,290,384us-gaap_CostOfRevenue
Gross (loss) profit 43,263,341us-gaap_GrossProfit (26,103,603)us-gaap_GrossProfit (37,431,983)us-gaap_GrossProfit
Polysilicon [Member]      
Segment Reporting Information [Line Items]      
Revenue 127,692,325us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
76,721,105us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
73,450,807us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
Wafer [Member]      
Segment Reporting Information [Line Items]      
Revenue 54,879,527us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
32,278,700us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
13,407,594us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
Operating Segments [Member] | Polysilicon [Member]      
Segment Reporting Information [Line Items]      
Revenue 157,117,208us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
89,916,943us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
79,518,146us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
Total Cost of revenue 119,703,550us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
98,684,325us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
110,243,043us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_PolysiliconMember
Gross (loss) profit 37,413,658us-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 54,879,527us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
32,278,700us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
13,407,594us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
Total Cost of revenue 47,861,811us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
49,614,921us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
20,114,680us-gaap_CostOfRevenue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dq_WaferMember
Gross (loss) profit 7,017,716us-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] 21,749,284us-gaap_Revenues
/ us-gaap_MajorCustomersAxis
= dq_CustomerIMember
Customer J [Member]      
Segment Reporting Information [Line Items]      
Revenue 23,882,302us-gaap_Revenues
/ us-gaap_MajorCustomersAxis
= dq_CustomerJMember
19,644,488us-gaap_Revenues
/ us-gaap_MajorCustomersAxis
= dq_CustomerJMember
   [1]
Customer C [Member]      
Segment Reporting Information [Line Items]      
Revenue 18,210,196us-gaap_Revenues
/ us-gaap_MajorCustomersAxis
= dq_CustomerCMember
   [1]    [1]
Customer K [Member]      
Segment Reporting Information [Line Items]      
Revenue    [1] $ 13,471,873us-gaap_Revenues
/ us-gaap_MajorCustomersAxis
= dq_CustomerKMember
   [1]
[1] Represents less than 10%