v3.25.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Document and Entity Information [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Securities Act File Number 001-41929  
Entity Registrant Name ARRIVENT BIOPHARMA, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-3336099  
Entity Address, Address Line One 18 Campus Boulevard Suite 100  
Entity Address, City or Town Newtown Square  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19073  
City Area Code 628  
Local Phone Number 277-4836  
Title of 12(b) Security Common Stock, $0.0001 Par Value per Share  
Trading Symbol AVBP  
Security Exchange Name NASDAQ  
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   40,568,944
Entity Central Index Key 0001868279  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false