Number of depositary shares issued during the period.

No definition available.

Name:	dq_DepositarySharesIssuedDuringPeriodShares
Namespace Prefix:	dq_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

SUBSEQUENT EVENTS (Details)	1 Months Ended		12 Months Ended							0 Months Ended			1 Months Ended			0 Months Ended
SUBSEQUENT EVENTS (Details)	Feb. 28, 2015 USD ($)	May 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Scenario, Previously Reported [Member] USD ($)	Dec. 31, 2014 Employee Stock Option [Member] USD ($)	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2012 Employee Stock Option [Member]	Jan. 28, 2014 Independent Directors [Member] Employee Stock Option [Member]	Jan. 28, 2014 Relevant Employees and Executive Officers [Member] Employee Stock Option [Member]	Jan. 12, 2015 Subsequent Event [Member] USD ($)	Feb. 28, 2015 Subsequent Event [Member] USD ($)	Jan. 31, 2015 Subsequent Event [Member] Pingan Bank [Member] USD ($)	Jan. 31, 2015 Subsequent Event [Member] Pingan Bank [Member] CNY	Jan. 12, 2015 Subsequent Event [Member] Employee Stock Option [Member]	Jan. 12, 2015 Subsequent Event [Member] Independent Directors [Member] Employee Stock Option [Member]
Subsequent Event [Line Items]
Options granted							6,274,166	140,000	1,190,000	566,666	5,707,500	6,274,166				6,534,375	600,000
Exercise price of options granted						$ 1.49	$ 1.49					$ 0.87
America depositary shares (ADSs) issued, shares		2,000,000											1,540,000
Follow-on equity offering, net of issuance costs, shares		50,000,000											38,500,000
Issuance cost for ordinary shares		$ (3,400,000)us-gaap_PaymentsOfStockIssuanceCosts	$ (3,375,553)us-gaap_PaymentsOfStockIssuanceCosts										$ (2,100,000)
Follow-on equity offering, net of issuance costs	28,000,000	54,600,000	54,624,447										28,000,000
Maximum borrowing amount of credit facility														32,200,000	200,000,000
Amount guaranteed by the Company														$ 6,500,000	40,000,000