Debt instrument consolidated fixed coverage ratio.

No definition available.

Name:	dxlg_DebtInstrumentConsolidatedFixedCoverageRatio
Namespace Prefix:	dxlg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument interest rate increase decrease of event of default.

+ References

No definition available.

+ Details

Name:	dxlg_DebtInstrumentInterestRateIncreaseDecreaseOfEventOfDefault
Namespace Prefix:	dxlg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument prepayment penalty percentage.

+ References

No definition available.

+ Details

Name:	dxlg_DebtInstrumentPrepaymentPenaltyPercentage
Namespace Prefix:	dxlg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The average unused portion of a line of credit that is available to the borrower to withdrawn upon.

+ References

No definition available.

+ Details

Name:	dxlg_LineOfCreditFacilityAverageUnusedExcessAvailability
Namespace Prefix:	dxlg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line of credit facility effective date.

+ References

No definition available.

+ Details

Name:	dxlg_LineOfCreditFacilityEffectiveDate
Namespace Prefix:	dxlg_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum excess available amount percentage to pursuant credit facility.

+ References

No definition available.

+ Details

Name:	dxlg_MinimumExcessAvailableAmountPercentageToPursuantCreditFacility
Namespace Prefix:	dxlg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum excess available amount to pursuant credit facility.

+ References

No definition available.

+ Details

Name:	dxlg_MinimumExcessAvailableAmountToPursuantCreditFacility
Namespace Prefix:	dxlg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of notes.

+ References

No definition available.

+ Details

Name:	dxlg_NumberOfNotes
Namespace Prefix:	dxlg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate, as a percentage of outstanding borrowings, due on the early prepayment of debt.

+ References

No definition available.

+ Details

Name:	dxlg_PercentageOfPrepaymentPenalty
Namespace Prefix:	dxlg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Net increase or decrease in the carrying amount of the debt instrument for the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

+ Details

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

- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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 210.5-02.22(a)(3))

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

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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

- Definition

Date the first payment under the line of credit must be paid, in CCYY-MM-DD format.

+ 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_LineOfCreditFacilityDateOfFirstRequiredPayment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

+ Details

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

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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

- Details

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

- 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

+ Details

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

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Debt - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended					0 Months Ended			9 Months Ended	0 Months Ended								9 Months Ended
Debt - Additional Information (Detail) (USD $)	Oct. 31, 2014	Nov. 01, 2014 Note	Jun. 26, 2013	Nov. 01, 2014 Banc of America Leasing & Capital, LLC 1st Anniversary	Nov. 01, 2014 Banc of America Leasing & Capital, LLC 1st Anniversary Until 2nd Anniversary	Oct. 30, 2014 Term loan, due 2019	Nov. 01, 2014 Term loan, due 2019	Nov. 01, 2014 Term loan, due 2019 1st Anniversary	Nov. 01, 2014 Term loan, due 2019 1st Anniversary Until 2nd Anniversary	Nov. 01, 2014 Term loan, due 2019 After second anniversary, but prior to third anniversary	Nov. 01, 2014 Term loan, due 2019 After third anniversary	Oct. 31, 2014 Federal Funds Rate	Nov. 01, 2014 Prime-based Borrowings	Nov. 01, 2014 LIBOR-based Borrowings	Nov. 01, 2014 Minimum	Oct. 31, 2014 Minimum Prime-based Borrowings	Oct. 31, 2014 Minimum LIBOR-based Borrowings	Oct. 31, 2014 Maximum Prime-based Borrowings	Oct. 31, 2014 Maximum LIBOR-based Borrowings	Nov. 01, 2014 Standby Letters of Credit	Nov. 01, 2014 Documentary Letters of Credit	Oct. 31, 2014 Commercial and Standby Letters of Credit	Oct. 31, 2014 Swingline Loans	Nov. 01, 2014 Master Agreement Banc of America Leasing & Capital, LLC	Jun. 30, 2014 Master Agreement Banc of America Leasing & Capital, LLC
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 125,000,000		$ 100,000,000			$ 15,000,000																$ 20,000,000	$ 15,000,000
Line of credit facility, potential maximum borrowing capacity	50,000,000
Line of credit facility, Initiation date	Jun. 26, 2018	Oct. 30, 2014
Line of credit facility, expiration date	Oct. 29, 2019
Line of credit facility, amount outstanding		38,000,000												30,000,000
Letters of credit outstanding, amount																				2,200,000	300,000
Line of credit facility, remaining borrowing capacity		75,100,000
Line of credit facility, average monthly outstanding amount		31,900,000
Line of credit facility, average unused excess availability		62,700,000
Debt instrument interest rate		10.00%
Line of credit facility		7,500,000
Debt Instrument Consolidated Fixed Coverage Ratio															100.00%
Line of credit facility, interest rate description		Borrowings made pursuant to the Credit Facility will bear interest at a rate equal to the base rate (determined as the highest of (a) Bank of America N.A.’s prime rate, (b) the Federal Funds rate plus 0.50% or (c) the annual LIBOR rate for the respective interest period) plus a varying percentage, based on the Company’s borrowing base, of 0.50%-0.75% for prime-based borrowings and 1.50%-1.75% for LIBOR-based borrowings.
Line of credit facility, basis spread on variable rate						6.50%						0.50%				0.50%	1.50%	0.75%	1.75%
Unused line fee	0.25%
Line of credit facility interest rate													3.75%	1.62%
Number of notes entered, equipment financing		12
Aggregate amount of notes borrowed																								8,900,000	26,400,000
Notes maturity term		48 months
Notes fixed interest rate, minimum		3.07%				1.00%
Notes fixed interest rate, minimum		3.50%
Prepayment penalty rate				1.00%	0.50%
Line of credit facility effective date						Oct. 29, 2014
Debt Instrument, Interest Rate Terms							The Term Loan Facility bears interest at a rate per annum equal to the greater of (a) 1.00% and (b) the one month LIBOR rate, plus 6.50%.
Debt Instrument, Payment Terms							Interest payments are payable on the first business day of each calendar month, and increase by 2% following the occurrence and during the continuance of an “event of default,” as defined in the Term Loan Facility.
Debt Instrument, Description of Variable Rate Basis							one month LIBOR rate
Debt Instrument Interest Rate Increase Decrease Of Event Of Default						2.00%
Line of Credit Facility, Periodic Payment, Principal							$ 250,000
Line of Credit Facility, Date of First Required Payment							Jan. 01, 2015
Line of Credit Facility, Frequency of Payments							Quarterly
Prepayments percentage								4.00%	2.00%	1.00%	0.00%
Debt instrument, maturity date							Oct. 29, 2019