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Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2022
Apr. 30, 2022
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2022  
Current Fiscal Year End Date --12-31  
Document Transition Report false  
Entity File Number 001-37527  
Entity Registrant Name XCEL BRANDS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 76-0307819  
Entity Address, Address Line One 1333 Broadway, 10th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10018  
City Area Code 347  
Local Phone Number 727-2474  
Title of 12(b) Security Common Stock, $0.001 par value per share  
Trading Symbol XELB  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   19,761,990
Entity Central Index Key 0001083220  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q1  
Amendment Flag false