Debt instrument consolidated fixed coverage ratio.

No definition available.

Name:	dxlg_DebtInstrumentConsolidatedFixedCoverageRatio
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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The average unused portion of a line of credit that is available to the borrower to withdrawn upon.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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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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Balance Type:	credit
Period Type:	duration

- Definition

Minimum excess available amount percentage to pursuant credit facility.

+ References

No definition available.

+ Details

Name:	dxlg_MinimumExcessAvailableAmountPercentageToPursuantCreditFacility
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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.

+ Details

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Data Type:	xbrli:integerItemType
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

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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://fasb.org/us-gaap/role/ref/legacyRef
-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

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

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

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix:	us-gaap_
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

Name:	us-gaap_DebtInstrumentLineItems
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

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
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-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586

+ Details

Name:	us-gaap_InterestPaid
Namespace Prefix:	us-gaap_
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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ Details

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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

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

+ Details

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Namespace Prefix:	us-gaap_
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

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 210
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+ Details

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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

- Details

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- Details

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Debt Obligations - Additional Information (Details)			12 Months Ended
Debt Obligations - Additional Information (Details)	May 24, 2018 USD ($)	Oct. 30, 2014 USD ($)	Feb. 02, 2019 USD ($) Note	Feb. 03, 2018 USD ($)	Jan. 28, 2017 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs			$ 243,000	$ 190,000
Wrote off of unamortized debt issuance costs			186,000
Interest and fees paid			3,000,000	$ 3,200,000	$ 2,800,000
Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 140,000,000		42,300,000
Line of credit facility, maximum borrowing capacity	125,000,000
Line of credit facility, potential maximum borrowing capacity	$ 50,000,000
Debt instrument interest rate	10.00%
Line of credit facility	$ 7,500,000
Unamortized debt issuance costs			400,000
Line of credit facility, remaining borrowing capacity			45,600,000
Line of credit facility, average monthly outstanding amount			54,100,000
Line of credit facility, average unused excess availability			$ 37,800,000
Unused line fee			0.25%
Wrote off of unamortized debt issuance costs			$ 100,000
Credit Facility \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, amount outstanding			$ 36,000,000
Line of credit facility interest rate			3.69%
Line of credit facility, expiration date			Feb. 07, 2019
Credit Facility \| Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility interest rate			5.75%
Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt instrument consolidated fixed coverage ratio	100.00%
Credit Facility \| Minimum \| Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	0.25%
Credit Facility \| Minimum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	1.25%
Credit Facility \| Maximum \| Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	0.50%
Credit Facility \| Maximum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	1.50%
Credit Facility \| Commercial And Standby Letter Of Credits
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 20,000,000
Credit Facility \| Swingline Loans
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	15,000,000
Credit Facility \| Standby Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount			$ 2,900,000
Credit Facility \| Documentary Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount			1,500,000
FILO Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000
FILO Loan \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, amount outstanding			$ 15,000,000
Line of credit facility interest rate			5.29%
Line of credit facility, expiration date			Feb. 07, 2019
Debt Instrument, Description of Variable Rate Basis			2-month LIBOR
FILO Loan \| Minimum \| Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate			1.75%
FILO Loan \| Minimum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate			2.75%
FILO Loan \| Maximum \| Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate			2.00%
FILO Loan \| Maximum \| LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate			3.00%
Master Agreement
Debt Instrument [Line Items]
Number of notes entered, equipment financing \| Note			12
Notes maturity term			48 months
Master Agreement \| Banc of America Leasing & Capital, LLC
Debt Instrument [Line Items]
Aggregate amount of notes borrowed			$ 26,400,000
Master Agreement \| Minimum
Debt Instrument [Line Items]
Notes fixed interest rate			3.07%
Master Agreement \| Maximum
Debt Instrument [Line Items]
Notes fixed interest rate			3.50%
Term Loan Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs			$ 100,000
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%
Debt Instrument, Description of Variable Rate Basis			one month LIBOR rate
Notes fixed interest rate		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			Interest on the Term Loan Facility was at a rate per annum equal to the greater of (a) 1.00% and (b) the one month LIBOR rate, plus 6.50%.