v3.26.1
Cover
Jun. 01, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 01, 2026
Entity File Number 001-41711
Entity Registrant Name USA Rare Earth, Inc.
Entity Central Index Key 0001970622
Entity Tax Identification Number 98-1720278
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 100 W. Airport Road
Entity Address, City or Town Stillwater
Entity Address, State or Province OK
Entity Address, Postal Zip Code 74075
City Area Code 813
Local Phone Number 867-6155
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.0001
Trading Symbol USAR
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false