Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Mar. 06, 2015	Aug. 02, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2015
Document Fiscal Year Focus	2014
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	--01-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		50,698,965
Entity Public Float			$ 158.7