v3.25.1
Cover - $ / shares
 3 Months Ended
Mar. 31, 2025
May 07, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2025  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Entity File Number 001-11460  
Entity Registrant Name Ernexa Therapeutics Inc.  
Entity Central Index Key 0000748592  
Entity Tax Identification Number 31-1103425  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 1035 Cambridge Street  
Entity Address, Address Line Two Suite 18A  
Entity Address, City or Town Cambridge  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02141  
City Area Code (617)  
Local Phone Number 798-6700  
Title of 12(b) Security Common stock, $0.005 par value per share  
Trading Symbol ERNA  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   62,363,763
Entity Listing, Par Value Per Share $ 0.005