XML 15 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 30, 2021
Jun. 30, 2020
Document And Entity Information [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Entity Registrant Name XCel Brands, Inc.    
Entity Filer Category Non-accelerated Filer    
Title of 12(b) Security Common Stock    
Trading Symbol XELB    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Security Exchange Name NASDAQ    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 10,967,000
Entity Common Stock, Shares Outstanding   19,260,862  
Entity Central Index Key 0001083220    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false