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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Additional Information) (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2015 | May. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Basis of presentation |  |  |  |  |  |
Working capital |  |  | $ (186,600,000) |  |  |
Cash and cash equivalents |  |  | 14,490,011 | $ 7,068,483 | $ 7,831,084 | $ 6,679,024
Short-term bank borrowings, including current portion of long-term bank borrowings |  |  | 123,936,995 | 159,803,876 |  |
Capital commitments relating to purchases of property, plant and equipment |  |  | 15,500,000 |  |  |
Bank accepted note facilities |  |  | $ 22,600,000 |  |  |
Consecutive years in which net income and positive cash flow from operations generated |  |  | 2 years |  |  |
Amounts due from related parties |  |  | $ 284,633 | 9,986,968 |  |
Current portion of long-term debt |  |  | 51,576,265 | 69,360,869 |  |
Follow-on equity offering, net of issuance costs | $ 28,000,000 | $ 54,600,000 | 27,996,959 | 54,624,447 |  |
Net income |  |  | 13,047,584 | 16,649,176 | (221,090,508) |
Cash flow from operations |  |  | 66,426,213 | 45,619,729 | (16,525,817) |
Restricted cash |  |  |  |  |  |
Restricted cash |  |  | 19,062,714 | 22,169,236 |  |
Inventories |  |  |  |  |  |
Inventory write-down |  |  | 62,422 | 175,568 | 29,905,734 |
Prepaid land use rights |  |  |  |  |  |
Lease Expenses |  |  | 595,716 | $ 628,052 | 781,706 |
Impairment of long-lived assets |  |  |  |  |  |
Long-lived asset impairment |  |  | 1,622,588 |  | 158,424,827 |
Shipping and handling |  |  |  |  |  |
Shipping and handling costs |  |  | 2,708,962 | $ 2,054,786 | 1,901,384 |
Government subsidies |  |  |  |  |  |
Unrestricted cash government subsidies |  |  | 3,578,865 | 926,173 | 5,249,788 |
Government grants related to assets |  |  | 690,889 | 113,735 | 1,172,160 |
Foreign currency translation |  |  |  |  |  |
Aggregate amount of cash and cash equivalents and restricted cash denominated in RMB |  |  | 30,891,550 | $ 24,356,970 |  |
Noncontrolling interest |  |  |  |  |  |
Noncontrolling interest |  |  | 1,302,027 |  |  |
Treasury Stock |  |  |  |  |  |
Share repurchase program, authorized amount |  |  |  |  | $ 5,000,000 |
Purchase price of treasury stock |  |  | 1,350,164 |  |  |
Daqo Group [Member] |  |  |  |  |  |
Basis of presentation |  |  |  |  |  |
Capital commitments relating to purchases of property, plant and equipment |  |  | $ 46,400,000 |  |  |
Amounts due from related parties |  |  |  | $ 5,110,085 |  |
Common Stock Outstanding [Member] |  |  |  |  |  |
Basis of presentation |  |  |  |  |  |
Follow-on equity offering, net of issuance costs |  |  | $ 3,850 | $ 5,000 |  |
Net income |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |
Number of shares repurchased |  |  | 2,356,900 |  |  |

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