OPERATING SEGMENT REPORTING - Geographic information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets
Non-current Assets	$ 446,903		$ 446,903		$ 447,066
Revenue	38,404	$ 25,988	107,551	$ 82,177
Investment in MSC	86,109		86,109		93,451
Minera Santa Cruz S.A.
Revenues from External Customers and Long-Lived Assets
Revenue	64,495	65,278	177,947	176,808
Investment in MSC	86,109		86,109		93,451	$ 90,961
USA
Revenues from External Customers and Long-Lived Assets
Non-current Assets	76,366		76,366		70,577
Revenue	17,967	12,596	45,526	34,334
Investment in Elder Creek exploration property	800		800		800
Canada
Revenues from External Customers and Long-Lived Assets
Non-current Assets	89,153		89,153		91,552
Revenue	20,259	13,058	61,847	46,200
Mexico
Revenues from External Customers and Long-Lived Assets
Non-current Assets	29,753		29,753		29,219
Revenue	178	$ 334	178	$ 1,643
Argentina
Revenues from External Customers and Long-Lived Assets
Non-current Assets	251,631		251,631		255,718
Argentina | Minera Santa Cruz S.A.
Revenues from External Customers and Long-Lived Assets
Investment in MSC	$ 86,100		$ 86,100		$ 93,500