v3.26.1
Segment disclosure - Disclosure of detailed information about geographical revenues segment reporting (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of operating segments [line items]    
Revenues $ 277,370 $ 191,157
Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 177,264 130,375
Streams [Member]    
Disclosure of operating segments [line items]    
Revenues 100,106 60,782
North America [Member]    
Disclosure of operating segments [line items]    
Revenues 177,621 134,305
North America [Member] | Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 165,738 126,101
North America [Member] | Streams [Member]    
Disclosure of operating segments [line items]    
Revenues 11,883 8,204
South America [Member]    
Disclosure of operating segments [line items]    
Revenues 51,596 23,709
South America [Member] | Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 5,765 1,338
South America [Member] | Streams [Member]    
Disclosure of operating segments [line items]    
Revenues 45,831 22,371
Australia [Member]    
Disclosure of operating segments [line items]    
Revenues 27,376 20,048
Australia [Member] | Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 347 240
Australia [Member] | Streams [Member]    
Disclosure of operating segments [line items]    
Revenues 27,029 19,808
Africa [Member]    
Disclosure of operating segments [line items]    
Revenues 5,414 2,696
Africa [Member] | Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 5,414 2,696
Africa [Member] | Streams [Member]    
Disclosure of operating segments [line items]    
Revenues 0 0
Europe [Member]    
Disclosure of operating segments [line items]    
Revenues 15,363 10,399
Europe [Member] | Royalties [Member]    
Disclosure of operating segments [line items]    
Revenues 0 0
Europe [Member] | Streams [Member]    
Disclosure of operating segments [line items]    
Revenues $ 15,363 $ 10,399