v3.26.1
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning $ 586,982  
Carrying values, ending 779,730 $ 586,982
Non-Producing Mineral Properties [Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 254,351  
Carrying values, ending 392,900 254,351
Carrying Values [Member] | Non-Producing Mineral Properties [Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 254,351 19,521
Acquisition 84,018 225,959
Capitalized expenditures 53,364 8,984
Environmental rehabilitation   (26)
Foreign currency translation impact 1,167 (87)
Carrying values, ending 392,900 254,351
Carrying Values [Member] | Non-Producing Mineral Properties [Member] | BYP[Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 6,580 6,636
Environmental rehabilitation   (26)
Foreign currency translation impact 339 (30)
Carrying values, ending 6,919 6,580
Carrying Values [Member] | Non-Producing Mineral Properties [Member] | Kuanping [Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 13,371 12,885
Capitalized expenditures 4,346 543
Foreign currency translation impact 828 (57)
Carrying values, ending 18,545 13,371
Carrying Values [Member] | Non-Producing Mineral Properties [Member] | El Domo [Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 208,180  
Acquisition   201,014
Capitalized expenditures 45,794 7,166
Carrying values, ending 253,974 208,180
Carrying Values [Member] | Non-Producing Mineral Properties [Member] | Condor [Member]    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Carrying values, beginning 26,220  
Acquisition   24,945
Capitalized expenditures 2,974 1,275
Carrying values, ending 29,194 $ 26,220
Carrying Values [Member] | Non-Producing Mineral Properties [Member] | Tulkubash    
Mineral Rights and Properties - Schedule of Non-Producing Properties (Details) [Line Items]    
Acquisition 84,018  
Capitalized expenditures 250  
Carrying values, ending $ 84,268