Debt instrument consolidated fixed coverage ratio.

No definition available.

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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

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument prepayment penalty percentage.

+ References

No definition available.

+ Details

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The average unused portion of a line of credit that is available to the borrower to withdrawn upon.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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Potential to increase to 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

No definition available.

+ Details

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

- Definition

Minimum excess available amount percentage to pursuant credit facility.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum excess available amount to pursuant credit facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of notes.

+ References

No definition available.

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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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

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

Reference 1: 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

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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

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Period Type:	duration

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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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

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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 FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(3))
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-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
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-SubTopic 30
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-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of cash paid for interest during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
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-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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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 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

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

+ References

+ Details

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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
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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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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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

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

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

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Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=dxlg_FederalFundsRateMember
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Period Type:

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Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Period Type:

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- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=dxlg_MasterAgreementMember
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Data Type:	na
Balance Type:
Period Type:

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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableToBanksMember
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Data Type:	na
Balance Type:
Period Type:

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Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
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Data Type:	na
Balance Type:
Period Type:

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Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
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Name:	us-gaap_DebtInstrumentAxis=dxlg_TermLoanFacilityMember
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
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Debt Obligations - Additional Information (Details)		12 Months Ended
Debt Obligations - Additional Information (Details)	Oct. 30, 2014 USD ($)	Jan. 30, 2016 USD ($) Note	Jan. 31, 2015 USD ($)	Feb. 01, 2014 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 493,000	$ 634,000
Interest and fees paid		2,800,000	$ 2,700,000	$ 1,400,000
Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 125,000,000
Line of credit facility, potential maximum borrowing capacity	$ 50,000,000
Line of credit facility, expiration date	Oct. 29, 2019
Line of credit facility, amount outstanding		42,400,000
Unamortized debt issuance costs		400,000
Line of credit facility, remaining borrowing capacity		66,000,000
Line of credit facility, average monthly outstanding amount		42,600,000
Line of credit facility, average unused excess availability		$ 66,700,000
Debt instrument interest rate		10.00%
Line of credit facility		$ 7,500,000
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 ICE-LIBOR rate (“LIBOR”) 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
Unused line fee		0.25%
Credit Facility \| Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Credit Facility \| Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility interest rate		4.00%
Credit Facility \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, amount outstanding		$ 35,000,000
Line of credit facility interest rate		1.92%
Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt Instrument Consolidated Fixed Coverage Ratio		100.00%
Credit Facility \| Minimum \| Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Credit Facility \| Minimum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, expiration date		Feb. 07, 2016
Line of credit facility, basis spread on variable rate		1.50%
Credit Facility \| Maximum \| Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.75%
Credit Facility \| Maximum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, expiration date		Feb. 17, 2016
Line of credit facility, basis spread on variable rate		1.75%
Master Agreement
Debt Instrument [Line Items]
Number of notes entered, equipment financing \| Note		12
Notes maturity term		48 months
Notes fixed interest rate, minimum		3.07%
Notes fixed interest rate, maximum		3.50%
Master Agreement \| Banc of America Leasing & Capital, LLC
Debt Instrument [Line Items]
Aggregate amount of notes borrowed		$ 26,400,000
Master Agreement \| Banc of America Leasing & Capital, LLC \| 1st Anniversary
Debt Instrument [Line Items]
Prepayment penalty rate		1.00%
Master Agreement \| Banc of America Leasing & Capital, LLC \| 1st Anniversary Until 2nd Anniversary
Debt Instrument [Line Items]
Prepayment penalty rate		0.50%
Term Loan Facility
Debt Instrument [Line Items]
Line of credit facility, Initiation date		Oct. 30, 2014
Term Loan Facility \| Term loan, due 2019
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	6.50%
Notes fixed interest rate, minimum	1.00%
Secured term loan facility, face amount	$ 15,000,000
Secured term loan 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%
Secured term loan facility, frequency of payments		Quarterly
Secured term loan facility, date of first required payment		Jan. 01, 2015
Secured term loan facility, periodic payment principal		$ 250,000
Debt instrument, maturity date		Oct. 29, 2019
Term Loan Facility \| Term loan, due 2019 \| 1st Anniversary
Debt Instrument [Line Items]
Prepayments percentage		4.00%
Term Loan Facility \| Term loan, due 2019 \| 1st Anniversary Until 2nd Anniversary
Debt Instrument [Line Items]
Prepayments percentage		2.00%
Term Loan Facility \| Term loan, due 2019 \| After second anniversary, but prior to third anniversary
Debt Instrument [Line Items]
Prepayments percentage		1.00%
Term Loan Facility \| Term loan, due 2019 \| After third anniversary
Debt Instrument [Line Items]
Prepayments percentage		0.00%
Commercial and Standby Letters of Credit \| Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 20,000,000
Swingline Loans \| Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000
Standby Letters of Credit \| Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 2,500,000
Documentary Letters of Credit \| Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 700,000