Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Document and Entity Information
Entity Registrant Name	GATOS SILVER, INC.
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Entity File Number	001-39649
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-2654848
Entity Address, Address Line One	8400 E. Crescent Parkway, Suite 600
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	784-5350
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	GATO
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		69,134,494
Entity Central Index Key	0001517006
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false