Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 10, 2022	Jun. 30, 2021
Document And Entity Information
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	001-33404
Document Period End Date	Dec. 31, 2021
Entity Registrant Name	WESTWATER RESOURCES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2212772
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
City Area Code	303
Local Phone Number	531-0516
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filer	No
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	WWR
Security Exchange Name	NYSEAMER
Entity's 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
Entity Shell Company	false
Entity Public Float			$ 159,632,860
Entity Common Stock, Shares Outstanding		35,371,336
Auditor Name	Moss Adams LLP
Auditor Firm ID	659
Auditor Location	Denver, Colorado
Entity Central Index Key	0000839470
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false