| Cover Page | Aug. 12, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 12, 2021 |
| Entity Registrant Name | BRICKELL BIOTECH, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-21088 |
| Entity Tax Identification Number | 93-0948554 |
| Entity Address, Address Line One | 5777 Central Avenue |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | BBI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000819050 |
| Amendment Flag | false |
