Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
Aug. 02, 2025	May 02, 2026
Store
Lessee Lease Description [Line Items]
Operating lease option to extend		5 years
Store \| Minimum
Lessee Lease Description [Line Items]
Operating lease initial term		5 years
Operating lease option to extend		5 years
Store \| Maximum
Lessee Lease Description [Line Items]
Operating lease initial term		10 years
Operating lease option to extend		5 years
Corporate Headquarter
Lessee Lease Description [Line Items]
Operating lease initial term	7 years
Operating lease option to extend	5 years
Operating lease maturity start date	Feb. 01, 2026
Operating lease maturity end date	Jan. 31, 2033
Corporate Headquarter \| Maximum
Lessee Lease Description [Line Items]
Improvement allowance	$ 4.7
Equipment and Other Assets \| Minimum
Lessee Lease Description [Line Items]
Operating lease initial term		3 years
Equipment and Other Assets \| Maximum
Lessee Lease Description [Line Items]
Operating lease initial term		5 years

Lessee improvement allowance.

No definition available.

Name:	dxlg_LesseeImprovementAllowance
Namespace Prefix:	dxlg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee Operating Lease Maturity End Date.

+ References

No definition available.

+ Details

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

- Definition

Lessee Operating Lease Maturity Start Date.

+ References

No definition available.

+ Details

Name:	dxlg_LesseeOperatingLeaseMaturityStartDate
Namespace Prefix:	dxlg_
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=dxlg_StoreMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=dxlg_CorporateHeadquarterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=dxlg_EquipmentAndOtherAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: