Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 06, 2020
Jun. 28, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol XBIO    
Entity Registrant Name Xenetic Biosciences, Inc.    
Entity Central Index Key 0001534525    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 5,342,529
Entity Common Stock, Shares Outstanding   6,284,915  
Current Reporting Status Yes    
Well known Seasoned Issuer No    
Entity Voluntary Filers Yes    
Entity Small Business true    
Entity Emerging Growth false    
Entity Interactive Data Current Yes    
Entity Shell Company false    
Entity Incorporation State Country Code NV    
Entity File Number 001-37937    
Security 12g Title Common Stock, $0.001 par value per share