Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 15, 2019
Jun. 29, 2018
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
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     $ 16,464,779
Entity Common Stock, Shares Outstanding   10,443,889  
Current Reporting Status Yes    
Well known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Small Business true    
Entity Emerging Growth false    
Entity Transition Period false    
Entity Shell Company false