Document and Entity Information - shares
9 Months Ended
Oct. 29, 2016
Nov. 11, 2016
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 29, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Trading Symbol DXLG  
Entity Registrant Name DESTINATION XL GROUP, INC.  
Entity Central Index Key 0000813298  
Current Fiscal Year End Date --01-28  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   50,823,803