XML 75 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 08, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-41944  
Entity Registrant Name Alto Neuroscience, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 83-4210124  
Entity Address, Address Line One 650 Castro Street, Suite 450  
Entity Address, City or Town Mountain View  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94041  
City Area Code 650  
Local Phone Number 200-0412  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol ANRO  
Security Exchange Name NYSE  
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   35,093,940
Current Fiscal Year End Date --12-31  
Entity Central Index Key 0001999480  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false