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Basis of Presentation - Additional Information (Details) (USD $)
3 Months Ended
May 02, 2015
Segment
May 03, 2014
Accounting Policies [Line Items]    
Number of reportable segments 1us-gaap_NumberOfReportableSegments  
Number of operating segments 2us-gaap_NumberOfOperatingSegments  
Amortization of deferred debt issuance costs $ 70,000us-gaap_AmortizationOfFinancingCosts $ 38,000us-gaap_AmortizationOfFinancingCosts
Rochester Trademark    
Accounting Policies [Line Items]    
Indefinite-lived intangible asset, carrying value 1,500,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= dxlg_RochesterTrademarksMember
 
Casual Male Trademark    
Accounting Policies [Line Items]    
Definite-lived intangible assets, carrying value $ 1,300,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= dxlg_CasualMaleTrademarksMember
 
Intangible assets, amortization period 2018