v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 07, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-43177  
Entity Registrant Name FIRST TRACKS BIOTHERAPEUTICS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 39-5003207  
Entity Address, Address Line One 10770 Wateridge Circle  
Entity Address, Address Line Two Suite 210  
Entity Address, City or Town San Diego  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92121  
City Area Code 858  
Local Phone Number 362-6295  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol TRAX  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Small Business true  
Entity Shell Company false  
Amendment Flag false  
Entity Central Index Key 0002091349  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Entity Common Stock, Shares Outstanding   35,730,843