v3.25.1
Share-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Options granted (in shares) 1,349,768 1,627,958
Weighted-average grant date fair value of options granted (in usd per share) $ 0.85 $ 2.90
Weighted average exercise price of options granted (in usd per share) $ 1.00 $ 3.67
Options forfeited (in shares) 396,807 70,946
Options outstanding (in shares) 8,133,504 7,645,076
Weighted average exercise price of options outstanding (in usd per share) $ 5.17 $ 6.20
Unrecognized compensation cost related to options $ 2.9  
Stock options    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Weighted-average period over which unrecognized compensation cost is expected to be recognized 2 years 1 month 6 days  
Barinthus Biotherapeutics plc Share Award Plan 2021 | Restricted share units, options, share appreciation rights and restricted shares    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Percentage of issued and outstanding ordinary shares available for issuance under the Plan 4.00%