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Agreement and Plan of Merger - Additional Information (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Nov. 14, 2024
USD ($)
yr
$ / shares
shares
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Agreement And Plan Of Merger [Line Items]      
ADSs issued amount | $   $ 2,242 $ 1,664
American Depositary Shares      
Agreement And Plan Of Merger [Line Items]      
Percentage of expected ownership in outstanding shares 48.40%    
Akari Ordinary Shares      
Agreement And Plan Of Merger [Line Items]      
Merger agreement exchange ratio per ordinary share 0.2935    
Akari Ordinary Shares | American Depositary Shares      
Agreement And Plan Of Merger [Line Items]      
Aggregate ADSs issued (in shares) 12,613,942    
Peak Bio      
Agreement And Plan Of Merger [Line Items]      
Date of acquisition Nov. 14, 2024    
Estimated fair value of adjusted warrants | $ $ 1,800    
Estimated fair value of the adjusted options | $ 1,800    
Peak Bio | Intellectual Property      
Agreement And Plan Of Merger [Line Items]      
Intangible assets | $ 39,200    
Peak Bio | Goodwill      
Agreement And Plan Of Merger [Line Items]      
Intangible assets | $ $ 8,400    
Peak Bio | Stock price      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 2.23    
Peak Bio | Volatility | Minimum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 84.1    
Peak Bio | Volatility | Maximum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 86.4    
Peak Bio | Expected dividend yield      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 0    
Peak Bio | Expected term (in years) | Minimum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input | yr 0.2    
Peak Bio | Expected term (in years) | Maximum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input | yr 5.32    
Peak Bio | Risk-free rate | Minimum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 4.3    
Peak Bio | Risk-free rate | Maximum      
Agreement And Plan Of Merger [Line Items]      
Warrants outstanding, measurement input 4.6    
Peak Bio | American Depositary Shares      
Agreement And Plan Of Merger [Line Items]      
Aggregate ADSs issued (in shares) 12,613,942    
Assumed options to purchase 16,996,592    
Peak Bio | American Depositary Shares | November 2022 Peak Warrants      
Agreement And Plan Of Merger [Line Items]      
Aggregate ADSs issued (in shares) 1,577,556    
Price per share | $ / shares $ 39.18    
Peak Bio | American Depositary Shares | April 2023 Peak Warrants      
Agreement And Plan Of Merger [Line Items]      
Aggregate ADSs issued (in shares) 1,187,013    
Price per share | $ / shares $ 2.04    
Peak Bio | Akari Ordinary Shares      
Agreement And Plan Of Merger [Line Items]      
Assumed options to purchase 25,227,884,000    
Peak Bio | Peak Bio Adjusted Options [Member] | American Depositary Shares      
Agreement And Plan Of Merger [Line Items]      
Assumed options to purchase 1,618,081