Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.3.1.900
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2015
Mar. 30, 2016
Jun. 30, 2015
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2015    
Document Fiscal Year Focus 2015    
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 Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   151,980,084  
Current Reporting Status Yes    
Well known Seasoned Issuer No    
Entity Voluntary Filers Yes    
Entity Public Float     $ 9,500,000