v3.26.1
Segment reporting - Schedule of Segment Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment reporting          
Revenue $ 724 $ 1,068 $ 1,582 $ 1,803  
Exploration Expenses 21,408 14,078 44,614 29,863  
Loss (income) from operations 21,480 25,635 (75,276) 52,639  
Segment assets 584,820   584,820   $ 483,273
Investments subject to significant influence 56,705   56,705   $ 58,399
Operating Segments          
Segment reporting          
Revenue 724 1,068 1,582 1,803  
Exploration Expenses 21,408 14,078 44,614 29,863  
General and administrative expenses 8,266 9,721 18,128 21,307  
Other segment items (7,470) 2,904 (136,436) 3,272  
Total segment operating expenses 22,204 26,703 (73,694) 54,442  
Loss (income) from operations 21,480 25,635 (75,276) 52,639  
Depreciation and amortization 459 702 1,067 1,362  
Segment assets 584,820 400,471 584,820 400,471  
Expenditures for segment assets 21,640 661 24,831 1,989  
Investments subject to significant influence 56,705 56,753 56,705 56,753  
Operating Segments | Santa Cruz Copper Project          
Segment reporting          
Revenue 0 0 0 0  
Exploration Expenses 10,537 5,425 20,037 11,929  
General and administrative expenses 0 0 0 0  
Other segment items 0 0 0 0  
Total segment operating expenses 10,537 5,425 20,037 11,929  
Loss (income) from operations 10,537 5,425 20,037 11,929  
Depreciation and amortization 44 38 74 76  
Segment assets 208,981 179,264 208,981 179,264  
Expenditures for segment assets 19,800 731 20,991 731  
Investments subject to significant influence 0 0 0 0  
Operating Segments | Critical Metals          
Segment reporting          
Revenue 0 0 0 0  
Exploration Expenses 10,871 8,653 24,577 17,934  
General and administrative expenses 7,578 8,853 16,607 19,143  
Other segment items (8,003) 2,555 (132,722) 2,555  
Total segment operating expenses 10,446 20,061 (91,538) 39,632  
Loss (income) from operations 10,446 20,061 (91,538) 39,632  
Depreciation and amortization 447 690 970 1,262  
Segment assets 319,646 161,856 319,646 161,856  
Expenditures for segment assets 1,644 661 3,138 1,258  
Investments subject to significant influence 11,882 15,988 11,882 15,988  
Operating Segments | Data Processing          
Segment reporting          
Revenue 724 1,068 1,582 1,803  
Exploration Expenses 0 0 0 0  
General and administrative expenses 154 162 422 335  
Other segment items 415 348 1,109 693  
Total segment operating expenses 569 510 1,531 1,028  
Loss (income) from operations (155) (558) (51) (775)  
Depreciation and amortization 12 12 23 24  
Segment assets 2,656 2,351 2,656 2,351  
Expenditures for segment assets 0 0 0 0  
Investments subject to significant influence 765 844 765 844  
Operating Segments | Energy Storage          
Segment reporting          
Revenue 0 0 0 0  
Exploration Expenses 0 0 0 0  
General and administrative expenses 534 706 1,099 1,829  
Other segment items 118 1 (4,823) 24  
Total segment operating expenses 652 707 (3,724) 1,853  
Loss (income) from operations 652 707 (3,724) 1,853  
Depreciation and amortization 0 0 0 0  
Segment assets 53,537 57,000 53,537 57,000  
Expenditures for segment assets 196 0 702 0  
Investments subject to significant influence $ 44,058 39,921 $ 44,058 39,921  
Intersegment revenues          
Segment reporting          
Revenue   0   10  
Intersegment revenues | Santa Cruz Copper Project          
Segment reporting          
Revenue   0   0  
Intersegment revenues | Critical Metals          
Segment reporting          
Revenue   0   0  
Intersegment revenues | Data Processing          
Segment reporting          
Revenue   0   10  
Intersegment revenues | Energy Storage          
Segment reporting          
Revenue   0   0  
Elimination of intersegment revenue          
Segment reporting          
Revenue   0   (10)  
Elimination of intersegment revenue | Santa Cruz Copper Project          
Segment reporting          
Revenue   0   0  
Elimination of intersegment revenue | Critical Metals          
Segment reporting          
Revenue   0   0  
Elimination of intersegment revenue | Data Processing          
Segment reporting          
Revenue   0   (10)  
Elimination of intersegment revenue | Energy Storage          
Segment reporting          
Revenue   $ 0   $ 0