Royalty Generation and Project Evaluation - Disclosure of detailed information about project and royalty generation costs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	$ 18,643	$ 17,213
Recoveries from partners	(7,398)	(8,577)
Net Expenditures	11,245	8,636
Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,800	1,948
Recoveries from partners	0	0
Net Expenditures	2,800	1,948
Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,124	3,166
Recoveries from partners	(759)	(1,782)
Net Expenditures	1,365	1,384
USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	10,397	9,631
Recoveries from partners	(6,639)	(6,787)
Net Expenditures	3,758	2,844
USA \| Scout
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	1,527	1,379
Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,143	933
Recoveries from partners	0	0
Net Expenditures	2,143	933
South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	453	744
Recoveries from partners	0	0
Net Expenditures	453	744
Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	726	791
Recoveries from partners	0	(8)
Net Expenditures	726	783
Administration costs
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	1,309	514
Administration costs \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	68	32
Administration costs \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	270	49
Administration costs \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	361	228
Administration costs \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	600	94
Administration costs \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	1	95
Administration costs \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	9	16
Drilling, technical, and support costs
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	7,626	6,665
Drilling, technical, and support costs \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	305	64
Drilling, technical, and support costs \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	946	1,554
Drilling, technical, and support costs \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	5,705	4,570
Drilling, technical, and support costs \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	409	142
Drilling, technical, and support costs \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	4	19
Drilling, technical, and support costs \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	257	316
Personnel
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	5,432	5,086
Personnel \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	1,588	1,108
Personnel \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	573	601
Personnel \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,019	2,388
Personnel \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	848	510
Personnel \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	74	183
Personnel \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	330	296
Property costs
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,571	2,885
Property costs \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	0	0
Property costs \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	140	569
Property costs \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	2,018	2,064
Property costs \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	56	1
Property costs \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	289	178
Property costs \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	68	73
Professional costs
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	772	819
Professional costs \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	439	404
Professional costs \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	10	33
Professional costs \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	124	56
Professional costs \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	94	101
Professional costs \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	74	197
Professional costs \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	31	28
Share-based payments
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	491	879
Share-based payments \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	200	276
Share-based payments \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	77	202
Share-based payments \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	136	297
Share-based payments \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	55	34
Share-based payments \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	11	54
Share-based payments \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	12	16
Travel
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	442	365
Travel \| Technical support and project evaluation
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	200	64
Travel \| Fennoscandia
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	108	158
Travel \| USA
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	34	28
Travel \| Eastern Europe and Morocco
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	81	51
Travel \| South America
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	0	18
Travel \| Other
Categories Of Royalty And Other Property Interests [Line Items]
Total project and royalty generation expenditures	$ 19	$ 46

Royalty Generation and Project Evaluation - Disclosure of detailed information about project and royalty generation costs (Details) - USD ($)
$ in Thousands