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ALLOWANCES FOR DOUBTFUL RECEIVABLES (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Analysis of allowances for accounts receivable is as follows: |  |  |
Beginning of the year | $ 7,160,782 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 1,592,467 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 1,202,940 us-gaap_AllowanceForDoubtfulAccountsReceivable
Allowances (Reversal) during the year | (3,823,744)us-gaap_ProvisionForDoubtfulAccounts | 5,482,019 us-gaap_ProvisionForDoubtfulAccounts | 359,733 us-gaap_ProvisionForDoubtfulAccounts
Foreign exchange effect | (147,928)dq_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect | 86,296 dq_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect | 29,794 dq_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect
Closing balance | 3,189,110 us-gaap_AllowanceForDoubtfulAccountsReceivable | 7,160,782 us-gaap_AllowanceForDoubtfulAccountsReceivable | 1,592,467 us-gaap_AllowanceForDoubtfulAccountsReceivable
Allowances reversed during the period | $ 4,171,528 us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries |  |

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- Definition Allowance For Doubtful Accounts Receivable, Foreign Exchange Effect. + References No definition available. + Details
Name: | dq_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect
Namespace Prefix: | dq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of recoveries of receivables doubtful of collection that were previously charged off. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration