v3.26.1
Cover - shares
3 Months Ended
Mar. 31, 2026
May 01, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Registrant Name Polaryx Therapeutics, Inc.  
Entity Central Index Key 0002075320  
Entity File Number 001-43080  
Entity Tax Identification Number 47-3393659  
Entity Incorporation, State or Country Code NV  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Address, Address Line One South Tower  
Entity Address, Address Line Two 140 E Ridgewood Avenue  
Entity Address, Address Line Three Suite 415  
Entity Address, City or Town Paramus  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07652  
City Area Code (201)  
Local Phone Number 940-7236  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol PLYX  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   47,343,297