Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2024	Nov. 13, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	000-54416
Entity Registrant Name	SCANDIUM INTERNATIONAL MINING CORP.
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	98-1009717
Entity Address, Address Line One	2011 Phaeton Lane
Entity Address, City or Town	Reno
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89521
City Area Code	775
Local Phone Number	355-9500
Title of 12(b) Security	None
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 (in shares)		355,860,813
Entity Central Index Key	0001408146
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false