v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
May 09, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Registrant Name CLIMB BIO, INC.  
Entity Central Index Key 0001768446  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity File Number 001-40708  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 83-2273741  
Entity Address, Address Line One 20 William Street  
Entity Address, Address Line Two Suite 145  
Entity Address, City or Town Wellesley Hills  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02481  
City Area Code 866  
Local Phone Number 857-2596  
Document Transition Report false  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol CLYM  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Entity Common Stock, Shares Outstanding   67,575,767