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

X

- 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

X

- 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

X

- 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

X

- Details

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

X

- 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