v3.25.4
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 06, 2026
Jun. 30, 2025
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Entity File Number 001-34852    
Entity Registrant Name RARE ELEMENT RESOURCES LTD    
Entity Incorporation, State or Country Code A1    
Entity Tax Identification Number 00-0000000    
Entity Address, Address Line One P.O. Box 80    
Entity Address, City or Town Firestone,    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80520    
City Area Code 720    
Local Phone Number 278-2460    
Title of 12(b) Security None    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 112,000,000
Entity Common Stock, Shares Outstanding   645,368,390  
Auditor Name Haynie & Company    
Auditor Location Salt Lake City, UT    
Auditor Firm ID 457    
Entity Central Index Key 0001419806    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Amendment Flag false