XML 10 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Cover - shares
 6 Months Ended
Jun. 30, 2026
Jul. 30, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-40367  
Entity Registrant Name BARINTHUS BIOTHERAPEUTICS PLC  
Entity Incorporation, State or Country Code X0  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 20400 Century Blvd  
Entity Address, Address Line Two Suite 210  
Entity Address, City or Town Germantown  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 20874  
City Area Code 443  
Local Phone Number 917-0966  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   40,848,893
Central Index Key 0001828185  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
American Depositary Shares    
Document Information [Line Items]    
Title of 12(b) Security American Depositary Shares  
Trading Symbol BRNS  
Security Exchange Name NASDAQ  
Ordinary shares    
Document Information [Line Items]    
Title of 12(b) Security Ordinary shares, nominal value £0.000025 per share