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Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 18, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-36327    
Entity Registrant Name Neurogene Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 98-0542593    
Entity Address, Address Line One 535 W 24th St.    
Entity Address, Address Line Two 5th Floor    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10011    
City Area Code 855    
Local Phone Number 508-3568    
Title of 12(b) Security Common stock, par value $0.000001 per share    
Trading Symbol NGNE    
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     $ 375,985,920
Entity Common Stock, Shares Outstanding   14,929,566  
Documents Incorporated by Reference
The information required by Part III of this Report, to the extent not set forth herein, is incorporated by reference from the registrant’s definitive proxy statement relating to the Annual Meeting of Stockholders to be held in 2025, which shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates (the “2025 Proxy Statement”).
    
Entity Central Index Key 0001404644    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false