v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 10, 2026
Entity Addresses [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Securities Act File Number 001-33404  
Entity Registrant Name WESTWATER RESOURCES, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 75-2212772  
Entity Address, Address Line One 7000 East Belleview Avenue, Suite 220  
Entity Address, City or Town Greenwood Village  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80111  
City Area Code 303  
Local Phone Number 531-0516  
Title of 12(b) Security Common Stock, $0.001 par value  
Trading Symbol WWR  
Security Exchange Name NYSEAMER  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   128,564,833
Entity Central Index Key 0000839470  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Former Address [Member]    
Entity Addresses [Line Items]    
Entity Address, Address Line One 6950 S. Potomac Street, Suite 300  
Entity Address, City or Town Centennial  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80112