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Commitments And Contingencies (Details) - Mt Todd, Australia
$ in Thousands
3 Months Ended
Mar. 31, 2022
AUD ($)
Loss Contingencies [Line Items]  
Percentage of ownership in project 100.00%
Scenario, Plan  
Loss Contingencies [Line Items]  
Mine Reclamation and Closing Liability, Noncurrent $ 73
Scenario, Plan | Jawoyn Association Aboriginal Corporation  
Loss Contingencies [Line Items]  
Percentage of royalty on gold 1.00%
Scenario, Plan | Minimum | Jawoyn Association Aboriginal Corporation  
Loss Contingencies [Line Items]  
Gross Proceeds Royalty, Additional Contingent Gross Proceeds Royalty, Percent 0.125%
Gross Proceeds Royalty, Including Contingent Additional Gross Proceeds Royalty, Percent 1.125%
Scenario, Plan | Maximum | Jawoyn Association Aboriginal Corporation  
Loss Contingencies [Line Items]  
Gross Proceeds Royalty, Additional Contingent Gross Proceeds Royalty, Percent 2.00%
Gross Proceeds Royalty, Including Contingent Additional Gross Proceeds Royalty, Percent 3.00%