CEO Transition Costs - Additional Information (Details) $ in Millions	6 Months Ended
Aug. 03, 2019 USD ($)
Related Party Transactions [Abstract]
CEO search costs, acting CEO consulting costs, housing allowance and legal fees	$ 0.7

Search costs acting consulting costs housing allowance and legal fees.

No definition available.

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