Accrued share based compensation.

No definition available.

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

- Definition

Awards vested date.

+ References

No definition available.

+ Details

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

- Definition

Employee service share-based compensation, cash based portion of award.

+ References

No definition available.

+ Details

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

- Definition

Percentage of performance based award payouts.

+ References

No definition available.

+ Details

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

- Definition

Projected benefit obligation percentage.

+ References

No definition available.

+ Details

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

- Definition

Share based compensation award as percentage of base salary.

+ References

No definition available.

+ Details

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

- Definition

Share based compensation weighted based on sales used in calculation of performance targets.

+ References

No definition available.

+ Details

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

- Definition

Targeted compensation percentage.

+ References

No definition available.

+ Details

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

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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

- Definition

General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

+ Details

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

- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

+ Details

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

- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

+ Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

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

- Definition

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

+ Details

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

- Definition

Aggregate value of stock related to Restricted Stock Awards issued during the period.

+ 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(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_PlanNameAxis=dxlg_TwoThousandAndSixIncentiveCompensationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_PlanNameAxis=dxlg_TwentyOneSixTwentyOneSevenLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=dxlg_TimeBasedVestingScheduleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=dxlg_PerformanceBasedVestingScheduleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=dxlg_NewLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=dxlg_SeniorExecutiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=dxlg_OtherParticipantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=dxlg_TwentyOneSevenTwentyOneEightLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=dxlg_PerformanceBasedCompensationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Apr. 02, 2018	Mar. 20, 2017	Feb. 01, 2017	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amount of liability reclassified from accrued expenses and other current liabilities to additional paid-in capital in conjunction with the grant of restricted stock awards				$ 920
Stock compensation expense				$ 1,636	$ 1,256	$ 2,195
2006 Incentive Compensation Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incentive plan expiration date				Jul. 31, 2016
2016 Long Term Incentive Wrap Around Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance based compensation description				The stock did not achieve a minimum of $6.75, therefore, no additional award was earned
Performance-based award payouts percentage				50.60%
Shares granted		$ 2,300
Cash awards		1,300
Amount of liability reclassified from accrued expenses and other current liabilities to additional paid-in capital in conjunction with the grant of restricted stock awards		900
2016 Long Term Incentive Wrap Around Plan \| 2016 Wrap-Around Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based compensation percentage				50.00%
2016 Long Term Incentive Wrap Around Plan \| Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted during the period, fair value		$ 1,000
Awards vested date				Jul. 28, 2017
2016 Long Term Incentive Wrap Around Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing stock price				$ 6.75
2016 Long Term Incentive Wrap Around Plan \| Minimum \| 2016 Wrap-Around Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based compensation percentage				80.00%
2016 Long Term Incentive Wrap Around Plan \| Maximum \| 2016 Wrap-Around Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based compensation percentage				100.00%
2016-2017 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incentive plan expiration date				Mar. 15, 2016
Performance-based award payouts percentage				54.40%
2016-2017 Long Term Incentive Plan \| Time Based Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock compensation expense				$ 1,900
2016-2017 Long Term Incentive Plan \| Performance Based Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock compensation expense				500
Accrued compensation expense				$ 400
2016-2017 Long Term Incentive Plan \| Restricted Stock Units (RSUs) \| Scenario, Forecast
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted	$ 500
New Long-Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incentive plan terms				each year the Compensation Committee will establish performance targets which will cover a two-year performance period (each a “Performance Period”), thereby creating overlapping Performance Periods. Each participant in the plan will be entitled to receive an award based on that participant’s “Target Cash Value” which is defined as the participant’s annual base salary (on the participant’s effective date) multiplied by his or her long-term incentive program percentage, which is 100% for the Company’s Chief Executive Officer, 70% for its senior executives and 25% for other participants in the plan. The Target Cash Value for any award is based on one year of annual salary.
Vesting plan			50.00%
New Long-Term Incentive Plan \| Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of salary			100.00%
New Long-Term Incentive Plan \| Senior Executive
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of salary			70.00%
New Long-Term Incentive Plan \| Other Participants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of salary			25.00%
New Long-Term Incentive Plan \| Time Based Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of benefit obligation			50.00%
New Long-Term Incentive Plan \| Performance Based Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of benefit obligation			50.00%
2017-2018 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation weighted based on sales used in calculation of performance targets			50.00%
2017-2018 Long Term Incentive Plan \| Time Based Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock compensation expense				$ 2,000
2017-2018 Long Term Incentive Plan \| Performance Based Compensation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock compensation expense				$ 2,000	$ 0