Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 11, 2021	Jun. 30, 2020
Document And Entity Information
Document Type	10-K
Document Period End Date	Dec. 31, 2020
Entity Registrant Name	WESTWATER RESOURCES, INC.
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	NASDAQ
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 Common Stock, Shares Outstanding		29,413,019
Entity Public Float			$ 17,661,760
Entity Central Index Key	0000839470
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false