v3.26.1
Document And Entity Information
12 Months Ended
Dec. 31, 2025
Document Information [Line Items]  
Document Type S-3
Entity Registrant Name MOLECULIN BIOTECH, INC.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 47-4671997
Entity Address, Address Line One 5300 Memorial Drive, Suite 950
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77007
City Area Code 713
Local Phone Number 300-5160
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false
Entity Central Index Key 0001659617
Amendment Flag false