Annual report pursuant to Section 13 and 15(d)


$ in Millions
12 Months Ended
Dec. 31, 2020
Mar. 05, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 000-21088    
Entity Registrant Name BRICKELL BIOTECH, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 93-0948554    
Entity Address, Address Line One 5777 Central Avenue, Suite 102,    
Entity Address, City or Town Boulder,    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80301    
City Area Code 720    
Local Phone Number 505-4755    
Title of 12(b) Security Common stock, $0.01 par value per share    
Trading Symbol BBI    
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 false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 26.6
Entity Common Stock, Shares Outstanding   66,929,896  
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement relating to its 2021 annual meeting of shareholders (the “2021 Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2021 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.    
Entity Central Index Key 0000819050    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Fiscal Year Focus 2020