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
Feb. 28, 2020
Jun. 30, 2019
Document And Entity Information      
Entity Registrant Name LIXTE BIOTECHNOLOGY HOLDINGS, INC.    
Entity Central Index Key 0001335105    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity a Well-known Seasoned Issuer No    
Entity a Voluntary Filer No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business Flag true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 14,659,000
Entity Common Stock, Shares Outstanding   67,045,814  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019