Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment, net
Santa Valeria Concession, royalty payment percentage	1.00%
Mineral lease payments made	$ 24	$ 414

Percentage of the net smelter returns on production payable as royalty for mineral properties.

No definition available.

Name:	gato_RoyaltyPaymentPercentage
Namespace Prefix:	gato_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration