v3.26.1
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2026
Aug. 13, 2026
Document Information [Line Items]    
Entity Registrant Name SILEXION THERAPEUTICS CORP  
Document Type 10-Q  
Document Period End Date Jun. 30, 2026  
Entity Central Index Key 0002022416  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Amendment Flag false  
Entity Current Reporting Status Yes  
Entity Common Stock, Shares Outstanding   5,560,256
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Shell Company false  
Entity Small Business true  
Entity Interactive Data Current Yes  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 12 Abba Hillel Road  
Entity Address, City or Town Ramat-Gan  
Entity Address, Postal Zip Code 5250606  
Entity Address, Country IL  
City Area Code +972  
Local Phone Number 3-756-4999  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-42253  
Entity Tax Identification Number 00-0000000  
Ordinary Shares [Member]    
Document Information [Line Items]    
Trading Symbol SLXN  
Security Exchange Name NASDAQ  
Title of 12(b) Security Ordinary shares, par value $0.135 per share  
Warrants exercisable for ordinary shares [Member]    
Document Information [Line Items]    
Trading Symbol SLXNW  
Security Exchange Name NASDAQ  
Title of 12(b) Security Warrants exercisable for ordinary shares at an exercise price of $15,525.00 per share