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Marketable Securities (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2020 CAD ($)
Marketable Securities |  |  |
Marketable securities, beginning | $ 2,675,000 | $ 2,675 | $ 346
Additions, upon acquisition of Eastmain |  |  | 1,662
Additions |  | 110 | 102
Sale of marketable securities | (1,000,000) |  |
Realized loss on disposition | (311,000) |  |
Unrealized net gain (loss) on marketable securities |  | (869) | 565
Marketable securities, ending | $ 605,000 | $ 605 | $ 2,675

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