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Revenue Recognition - Additional Information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Feb. 01, 2020 USD ($) Segment | Feb. 02, 2019 USD ($)
Revenue From Contract With Customer [Abstract] |  |
Percentage of customers participate in loyalty program | 90.00% |
Loyalty accrual, net of breakage | $ 1.0 | $ 1.0
Gift card liability, net of breakage | $ 2.7 | $ 2.4
Number of reportable segments | Segment | 1 |

X
- Definition Gift card liability net of breakage. + References No definition available. + Details
Name: | dxlg_GiftCardLiabilityNetOfBreakage
Namespace Prefix: | dxlg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loyalty accrual net of breakage current. + References No definition available. + Details
Name: | dxlg_LoyaltyAccrualNetOfBreakageCurrent
Namespace Prefix: | dxlg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of customers participate in loyalty program. + References No definition available. + Details
Name: | dxlg_PercentageOfCustomersParticipateInLoyaltyProgram
Namespace Prefix: | dxlg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration