v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 14, 2026
Document Information Line Items    
Entity Central Index Key 0001787518  
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 001-39341  
Entity Registrant Name T3 DEFENSE INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 38-3912845  
Entity Address, Address Line One 575 Fifth Ave  
Entity Address, Address Line Two 14th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 212  
Local Phone Number 791-4663  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   1,663,806
Amendment Flag false  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Common Stock, $0.0001 par value per share    
Document Information Line Items    
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol DFNS  
Security Exchange Name NASDAQ  
Warrants, each warrant exercisable for one share of common stock for $92.00 per share    
Document Information Line Items    
Title of 12(b) Security Warrants, each warrant exercisable for one Share of Common Stock for $11,500.00 per share  
Trading Symbol DFNSW  
Security Exchange Name NASDAQ