Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.21.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 23, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 001-38191    
Entity Registrant Name MUSTANG BIO, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-3828760    
Entity Address, Address Line One 377 Plantation Street    
Entity Address, City or Town Worcester    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01605    
City Area Code 781    
Local Phone Number 652-4500    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol MBIO    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 0
Entity Central Index Key 0001680048    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Amendment Flag false    
Class A Common Shares [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   845,385  
Common Shares [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   84,329,415