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RECEIVABLES AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Receivables, prepaids and other assets    
Government sales tax receivable $ 3,708 $ 1,810
Prepaids and other assets 6,883 3,880
Receivables and other current assets 10,591 5,690
Black Fox Complex    
Receivables, prepaids and other assets    
Government sales tax receivable $ 2,200 $ 400