v3.26.1
Document and Entity Information
 12 Months Ended
Dec. 31, 2025
shares
Dec. 31, 2024
Apr. 25, 2024
Document and Entity Information      
Document Type 20-F    
Document Registration Statement false    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Document Shell Company Report false    
Entity File Number 001-41359    
Entity Registrant Name Belite Bio, Inc    
Entity Incorporation, State or Country Code E9    
Entity Address, Address Line One 12750 High Bluff Drive Suite 475,    
Entity Address, City or Town San Diego    
Entity Address, Country CA    
Entity Address, Postal Zip Code 92130    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Accounting Standard U.S. GAAP    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding 39,339,960    
Entity Central Index Key 0001889109    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name Deloitte & Touche Marcum Asia CPAs LLP  
Auditor Location Taipei, Taiwan New York, New York  
Auditor Firm ID 1060 5395  
Document Financial Statement Error Correction [Flag] false    
American depositary shares, each representing one ordinary share      
Document and Entity Information      
Title of 12(b) Security American depositary shares, each representing one ordinary share    
Entity Listing, Depository Receipt Ratio 1   1
Trading Symbol BLTE    
Security Exchange Name NASDAQ    
Ordinary shares, par value US$0.0001 per share      
Document and Entity Information      
Title of 12(b) Security Ordinary shares, par value US$0.0001 per share    
No Trading Symbol Flag true    
Security Exchange Name NASDAQ    
Business Contact [Member]      
Document and Entity Information      
Entity Address State Or Province CA    
Entity Address, Address Line One 12750 High Bluff Drive Suite 475,    
Entity Address, City or Town San Diego,    
Entity Address, Postal Zip Code 92130    
Country Region 1    
City Area Code 858    
Local Phone Number 246-6240    
Contact Personnel Name Yu-Hsin Lin    
Contact Personnel Email Address tomlin@belitebio.com