CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net (loss) income	$ 16,649,176us-gaap_ProfitLoss	$ (221,090,508)us-gaap_ProfitLoss	$ (115,637,415)us-gaap_ProfitLoss
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Long-lived assets impairment		158,424,827us-gaap_AssetImpairmentCharges	42,754,481us-gaap_AssetImpairmentCharges
Share-based compensation	1,792,819us-gaap_ShareBasedCompensation	1,881,401us-gaap_ShareBasedCompensation	2,249,834us-gaap_ShareBasedCompensation
Inventory write-down	175,568us-gaap_InventoryWriteDown	29,905,734us-gaap_InventoryWriteDown	14,821,620us-gaap_InventoryWriteDown
Allowance for doubtful accounts	(3,823,744)us-gaap_ProvisionForDoubtfulAccounts	5,482,019us-gaap_ProvisionForDoubtfulAccounts	359,733us-gaap_ProvisionForDoubtfulAccounts
Depreciation of property, plant and equipment	28,007,943us-gaap_Depreciation	52,250,595us-gaap_Depreciation	37,371,791us-gaap_Depreciation
Gain on disposition of Nanjing Daqo			(1,099,299)
Loss on disposal of Property Plant and Equipment	314,728
Changes in operating assets and liabilities:
Accounts receivable	4,775,333	12,431,119	(10,295,169)
Note receivables	(34,702,180)	(11,496,473)	(2,633,764)
Prepaid expenses and other current assets	10,217,835	29,616	(15,042,913)
Advances to suppliers	(513,373)dq_IncreaseDecreaseInAdvancePayments	(122,753)dq_IncreaseDecreaseInAdvancePayments	2,098,761dq_IncreaseDecreaseInAdvancePayments
Inventories	484,562us-gaap_IncreaseDecreaseInInventories	(25,270,470)us-gaap_IncreaseDecreaseInInventories	(6,745,803)us-gaap_IncreaseDecreaseInInventories
Amount due from related parties	2,193,604	(6,853,965)	8,418,601
Prepaid land use rights	623,413	264,549	(841,195)
Other non-current assets	229,688	4,513,271	4,645,277
Accounts payable	(475,966)	5,349,428	3,249,172
Note payables	31,992,814	(19,760,436)	16,776,966
Accrued expenses and other current liabilities	1,677,622	468,946	(150,005)
Income tax payable		(160,480)	(8,052,589)
Advances from customers	(13,813,120)	(4,254,342)	(8,794,585)
Amount due to related parties	(453,075)	(415,960)	14,047,531
Deferred government subsidies	266,082	482,563	618,958
Deferred tax assets		1,415,502	11,572,778
Net cash (used in) provided by operating activities	45,619,729	(16,525,817)	(10,307,234)
Investing activities:
Purchases of property, plant and equipment	(77,028,755)	(32,504,507)	(105,659,395)
(Decrease)/Increase in restricted cash	(13,560,277)	1,823,635	80,435
Proceeds from disposition of Nanjing Daqo			2,656,490
Decrease in cash on deconsolidation of Daqo New Material		(15,241)us-gaap_CashDivestedFromDeconsolidation
Net cash used in investing activities	(90,589,032)	(30,696,113)	(102,922,470)
Financing activities:
Proceeds from related parties loans	275,134,122us-gaap_ProceedsFromRelatedPartyDebt	157,271,287us-gaap_ProceedsFromRelatedPartyDebt	1,645,923us-gaap_ProceedsFromRelatedPartyDebt
Repayment of related parties loans	(275,088,560)us-gaap_RepaymentsOfRelatedPartyDebt	(69,386,568)us-gaap_RepaymentsOfRelatedPartyDebt
Proceeds from bank borrowings	176,114,553us-gaap_ProceedsFromBankDebt	74,551,991us-gaap_ProceedsFromBankDebt	129,572,090us-gaap_ProceedsFromBankDebt
Repayment of bank borrowings	(186,549,888)us-gaap_RepaymentsOfBankDebt	(113,745,197)us-gaap_RepaymentsOfBankDebt	(103,573,459)us-gaap_RepaymentsOfBankDebt
Purchase and retirement of treasury shares			(500,724)
Proceeds from options exercised	37,080	135,171
Proceeds from follow-on equity offering	58,000,000
Insurance cost for follow-on equity offering	(3,375,553)us-gaap_PaymentsOfStockIssuanceCosts
Net cash provided by financing activities	44,271,754	48,826,684	27,143,830
Effect of exchange rate changes on cash and cash equivalents	(65,052)	(452,694)	67,800
Net (decrease) increase in cash and cash equivalents	(762,601)	1,152,060	(86,018,074)
Cash and cash equivalents at the beginning of the year	7,831,084	6,679,024	92,697,098
Cash and cash equivalents at the end of the year	7,068,483	7,831,084	6,679,024
Supplemental disclosure of cash flow information:
Interest paid	17,771,457us-gaap_InterestPaid	19,657,071us-gaap_InterestPaid	15,555,495us-gaap_InterestPaid
Income taxes paid			8,052,589us-gaap_IncomeTaxesPaid
Disposition and Deconsolidation:
Less: cash and cash equivalents disposed		(15,241)us-gaap_CashDivestedFromDeconsolidation
Net cash inflow on the disposition			2,656,490
Supplemental schedule of non-cash investing activities:
Purchases of property, plant and equipment included in payable	79,989,590	51,766,695	46,594,935
Purchases of property, plant and equipment included in amount due to related parties	5,651,053	940,135	5,678,393
Nanjing Daqo [Member]
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Gain on disposition of Nanjing Daqo			(1,099,299)
Investing activities:
Proceeds from disposition of Nanjing Daqo			2,656,490
Decrease in cash on deconsolidation of Daqo New Material			(2,122,167)
Disposition and Deconsolidation:
Total consideration			9,888,742
Less: amount due from Daqo Group			(5,110,085)
Total cash consideration received			4,778,657
Less: cash and cash equivalents disposed			(2,122,167)
Net cash inflow on the disposition			$ 2,656,490

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of noncash consideration received for selling an asset or business through a noncash (or part noncash) transaction.

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The cash outflow to reacquire common stock during the period.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from bank borrowing during the year.

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This element represents the cash inflow during the period from the sale of a component of the entity.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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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.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The cash outflow to settle a bank borrowing during the year.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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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.

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