v3.26.1
Document And Entity Information
 12 Months Ended
Dec. 31, 2025
Document Information Line Items  
Entity Central Index Key 0001918080
Amendment Description AMENDMENT NO. 4
Document Type S-1/A
Entity Registrant Name Deep Isolation Nuclear, Inc.
Entity Incorporation, State or Country Code DE
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag true