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Mineral Property, Plant and Equipment (Trillium) (Details) - Dec. 17, 2020 - Trillium
$ in Millions, $ in Millions
CAD ($)
USD ($)
Disclosure of detailed information about business combination [line items]    
Cash transferred $ 25.0 $ 19.5
Cash and cash equivalents recognised as of acquisition date   0.1
Current assets recognised as of acquisition date   $ 0.1