v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Jun. 12, 2026
Sep. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2026    
Current Fiscal Year End Date --03-31    
Document Transition Report false    
Entity File Number 001-37761    
Entity Registrant Name Vistagen Therapeutics, Inc.    
Entity Incorporation, State or Country Code NV    
Entity Tax Identification Number 20-5093315    
Entity Address, Address Line One 343 Allerton Avenue    
Entity Address, City or Town South San Francisco    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94080    
City Area Code 650    
Local Phone Number 577-3600    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol VTGN    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 137.7
Entity Common Stock, Shares Outstanding   41,032,453  
Amendment Flag false    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001411685