OPERATING SEGMENT REPORTING - Geographic information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Operating Segment Reporting
Long-lived Assets	$ 449,068		$ 449,068		$ 440,315
Revenue	25,988	$ 37,129	82,177	$ 101,575
Investment in MSC	92,824		92,824		90,961
Total which excludes Company's ROU office lease asset	400		400
Minera Santa Cruz S.A.
Operating Segment Reporting
Revenue	65,278	72,098	176,808	195,797
Investment in MSC	92,824		92,824		90,961	$ 108,326
UNITED STATES
Operating Segment Reporting
Long-lived Assets	38,404		38,404		37,877
Revenue	12,596	21,683	34,334	60,919
Canada
Operating Segment Reporting
Long-lived Assets	95,570		95,570		93,294
Revenue	13,058	14,227	46,200	34,966
MEXICO
Operating Segment Reporting
Long-lived Assets	29,385		29,385		26,561
Revenue	334	$ 1,219	1,643	$ 5,690
ARGENTINA
Operating Segment Reporting
Long-lived Assets	285,709		285,709		282,583
ARGENTINA | Minera Santa Cruz S.A.
Operating Segment Reporting
Investment in MSC	$ 92,800		$ 92,800		$ 90,900