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Commitments and Contingent Liabilities (Details)
$ in Thousands, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended 60 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2024
AUD ($)
Dec. 31, 2023
AUD ($)
Dec. 31, 2022
AUD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Commitments and Contingent Liabilities                    
Exploration and evaluation expenses $ 22,663 $ 23,848 $ 40,340 $ 80,181            
Nauru Ocean Resources Inc                    
Commitments and Contingent Liabilities                    
NORI spend in 2022                 $ 25,000 $ 40,000
Marawa Research and Exploration Limited                    
Commitments and Contingent Liabilities                    
Exploration and evaluation expenses         $ 2 $ 3 $ 1      
Tonga Off shore Mining Limited                    
Commitments and Contingent Liabilities                    
Spending committed               $ 30,000    
Exploration and evaluation expenses               $ 13,300    
Long-term Purchase Commitment, Period               5 years