v3.26.1
Cover
Mar. 26, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 26, 2026
Entity File Number 001-42888
Entity Registrant Name Fermi Inc.
Entity Central Index Key 0002071778
Entity Tax Identification Number 33-3560468
Entity Incorporation, State or Country Code TX
Entity Address, Address Line One 620 S. Taylor St.
Entity Address, Address Line Two Suite 301
Entity Address, City or Town Amarillo
Entity Address, State or Province TX
Entity Address, Postal Zip Code 79101
City Area Code 214
Local Phone Number 894-7855
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period true
Common Stock, $0.001 par value  
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol FRMI
Security Exchange Name NASDAQ
Common Stock 0. 001 Par Value Member 1 [Member]  
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol FRMI