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Document and Entity Information - USD ($)
 12 Months Ended
Jan. 29, 2022
Mar. 15, 2022
Jul. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 29, 2022    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Trading Symbol DXLG    
Entity Registrant Name DESTINATION XL GROUP, INC.    
Entity Central Index Key 0000813298    
Current Fiscal Year End Date --01-29    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   64,301,152  
Entity Public Float     $ 199.9
Entity File Number 01-34219    
Entity Tax Identification Number 04-2623104    
Entity Address, Address Line One 555 Turnpike Street    
Entity Address, City or Town Canton    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02021    
City Area Code 781    
Local Phone Number 828-9300    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Security Exchange Name NASDAQ    
Entity Incorporation, State or Country Code DE    
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference

Portions of the Proxy Statement for the 2022 Annual Meeting of Stockholders are incorporated by reference into Part III.

   
Auditor Name KPMG LLP    
Auditor Location Boston, MA    
Auditor Firm ID 185