SIGNIFICANT ACCOUNTING POLICIES - Risks and Uncertainties (Details) - USD ($) $ in Millions					3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 09, 2021	Jan. 29, 2021	Dec. 31, 2020	Sep. 10, 2020	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Los Azules Copper Project
Gross proceeds					$ 40.0
Equity Financing In February 2021
Gross proceeds	$ 31.5					$ 31.5
Canadian Development Expenses | Flow Through Common Shares
Gross proceeds		$ 12.7				$ 12.7
Canadian Exploration Expenditures
Gross proceeds							$ 20.2
Canadian Exploration Expenditures | Flow Through Common Shares
Gross proceeds			$ 9.8	$ 10.4