v3.26.3
Segment information - Schedule of Segment Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Disclosure of operating segments [line items]          
Revenue $ 264,336 $ 154,040 $ 1,932,077 $ 479,491  
Cost of sales (98,825) (91,456) (1,264,748) (264,942)  
Gain (loss) on foreign exchange 31,645 332,792 642,932 576,239  
General and administrative expenses (5,139,060) (4,117,271) (15,220,938) (11,428,041)  
Depreciation and amortization (359,847) (380,558) (1,125,033) (1,079,218)  
Interest income 187,598 75,954 443,269 489,863  
Fair value gain (loss) on embedded derivatives 322,000 (2,895,000) 1,871,000 11,250,000  
Fair value gain on warrants 500,000 0 1,560,000 0  
Fair value gain on deferred consideration 193,887 (3,690,000) 5,486,804 (3,690,000)  
Interest expense (2,772,189) (2,756,029) (8,230,024) (7,635,872)  
Loss before tax (6,870,455) (13,367,528) (13,904,661) (11,302,480)  
Segment assets 204,202,569   204,202,569   $ 175,751,683
Segment liabilities 115,838,223   115,838,223   102,918,928
Non-current assets 177,858,068   177,858,068   148,303,086
Tanzania          
Disclosure of operating segments [line items]          
Non-current assets 175,148,592   175,148,592   144,521,639
Australia          
Disclosure of operating segments [line items]          
Non-current assets 2,699,073   2,699,073   3,075,959
Rest of the world          
Disclosure of operating segments [line items]          
Non-current assets 10,403   10,403   705,488
Inter-Segment eliminations          
Disclosure of operating segments [line items]          
Revenue (1,354,405) (1,139,678) (4,175,262) (4,090,895)  
Cost of sales 1,216,677 931,258 3,852,306 3,317,529  
Gain (loss) on foreign exchange 0 0 0 0  
General and administrative expenses 52,533 119,846 51,944 548,658  
Depreciation and amortization 0 0 2,215 0  
Interest income (1,629,656) (1,399,140) (4,657,033) (3,782,349)  
Fair value gain (loss) on embedded derivatives 0 0 0 0  
Fair value gain on warrants 0   0    
Fair value gain on deferred consideration 0 0 0 0  
Interest expense 0 0 0 0  
Loss before tax (1,714,851) (1,487,714) (4,925,830) (4,007,057)  
Segment assets (322,759,664)   (322,759,664)   (287,370,479)
Segment liabilities (102,691,275)   (102,691,275)   (85,261,778)
Intellectual Property          
Disclosure of operating segments [line items]          
Segment assets 158,872,330   158,872,330   144,404,325
Intellectual Property | Operating segments          
Disclosure of operating segments [line items]          
Revenue 316,544 299,285 1,985,910 951,224  
Cost of sales (98,825) (91,457) (1,264,748) (264,943)  
Gain (loss) on foreign exchange 99,364 (23,004) 370,672 511,962  
General and administrative expenses (1,272,340) (1,143,889) (3,521,578) (3,045,256)  
Depreciation and amortization (350,063) (348,530) (1,091,056) (1,017,185)  
Interest income 1,632,750 1,414,140 4,674,577 3,821,592  
Fair value gain (loss) on embedded derivatives 0 0 0 0  
Fair value gain on warrants 0   0    
Fair value gain on deferred consideration 193,887 (3,690,000) 5,486,804 (3,690,000)  
Interest expense (10,672) (5,025) (23,197) (16,680)  
Loss before tax 510,645 (3,588,480) 6,617,384 (2,749,286)  
Segment liabilities 21,863,251   21,863,251   26,695,036
Metals Extraction          
Disclosure of operating segments [line items]          
Segment assets 197,088,078   197,088,078   165,038,598
Metals Extraction | Operating segments          
Disclosure of operating segments [line items]          
Revenue 0 0 0 0  
Cost of sales 0 0 0 0  
Gain (loss) on foreign exchange (60,567) 375,422 294,141 90,992  
General and administrative expenses (247,391) (348,472) (1,473,508) (1,744,972)  
Depreciation and amortization (5,692) (5,692) (17,075) (17,075)  
Interest income 0 89 0 99  
Fair value gain (loss) on embedded derivatives 0 0 0 0  
Fair value gain on warrants 0   0    
Fair value gain on deferred consideration 0 0 0 0  
Interest expense (41,273) (29,295) (142,845) (42,743)  
Loss before tax (354,923) (7,948) (1,339,287) (1,713,699)  
Segment liabilities 135,152,269   135,152,269   102,843,488
Corporate          
Disclosure of operating segments [line items]          
Segment assets 171,001,825   171,001,825   153,679,239
Corporate | Operating segments          
Disclosure of operating segments [line items]          
Revenue 1,302,197 994,433 4,121,429 3,619,162  
Cost of sales (1,216,677) (931,257) (3,852,306) (3,317,528)  
Gain (loss) on foreign exchange (7,152) (19,626) (21,881) (26,715)  
General and administrative expenses (3,671,862) (2,744,756) (10,277,796) (7,186,471)  
Depreciation and amortization (4,092) (26,336) (19,117) (44,958)  
Interest income 184,504 60,865 425,725 450,521  
Fair value gain (loss) on embedded derivatives 322,000 (2,895,000) 1,871,000 11,250,000  
Fair value gain on warrants 500,000   1,560,000    
Fair value gain on deferred consideration 0 0 0 0  
Interest expense (2,720,244) (2,721,709) (8,063,982) (7,576,449)  
Loss before tax (5,311,326) $ (8,283,386) (14,256,928) $ (2,832,438)  
Segment liabilities $ 61,513,978   $ 61,513,978   $ 58,642,182