Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.10.0.1
Document And Entity Information - shares
9 Months Ended
Sep. 30, 2018
Nov. 09, 2018
Document And Entity Information [Abstract]    
Entity Registrant Name Moleculin Biotech, Inc.  
Entity Central Index Key 0001659617  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Trading Symbol MBRX  
Entity Common Stock, Shares Outstanding   27,129,510