v3.8.0.1
Document and Entity Information - shares
3 Months Ended
May 05, 2018
May 15, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 05, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Trading Symbol DXLG  
Entity Registrant Name DESTINATION XL GROUP, INC.  
Entity Central Index Key 0000813298  
Current Fiscal Year End Date --02-02  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   49,010,087