Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.20.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 23, 2020
Jun. 30, 2019
Document And Entity Information      
Entity Registrant Name GT Biopharma, Inc.    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Entity Central Index Key 0000109657    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? No    
Entity Filer Category Non-accelerated Filer    
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Shell Company false    
Entity Public Float     $ 7,200,000
Entity Common Stock, Shares Outstanding   70,602,433  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Current Fiscal Year End Date --12-31    
Entity File Number 000-08092