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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands		12 Months Ended
	May 23, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Aug. 10, 2018
RELATED PARTY TRANSACTIONS
Long-term debt from related party (note 18)		$ 24,080	$ 19,758
Number of units issued	1,935,484
Net proceeds	$ 2,600			$ 918
Robert McEwen | Term Loan
RELATED PARTY TRANSACTIONS
Face amount					$ 50,000
Long-term debt from related party (note 18)					$ 25,000
Affiliate of Robert McEwen
RELATED PARTY TRANSACTIONS
Debt interest expense		$ 2,400	$ 2,400
Number of units issued		1,045,850
Net proceeds		$ 900

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