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ALLOWANCES FOR DOUBTFUL RECEIVABLES (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Analysis of allowances for accounts receivable is as follows: |  |  |
Beginning of the year | $ 1,087,465 | $ 3,189,110 | $ 7,160,782
Reversal during the year | (1,053,041) | (2,026,567) | (3,823,744)
Foreign exchange effect | (24,261) | (75,078) | (147,928)
Closing balance | 10,163 | 1,087,465 | 3,189,110
Allowances reversed during the period | $ 1,053,041 | $ 2,026,567 | $ 3,823,744

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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 Amount of expense (income) 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 No definition available. + Details
Name: | dq_ProvisionForReversalOfDoubtfulAccounts
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 FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 Reference 2: 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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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration