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Note 9 - Production Costs - Components of Production Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement Line Items [Line Items]      
Cost of sales $ 82,709 $ 62,998 $ 53,126
Blanket Mine [member]      
Statement Line Items [Line Items]      
Production costs 69,591 62,998 53,126
Salaries and wages 25,042 23,037 20,609
Consumable materials 24,087 23,601 17,375
Consumable materials – COVID-19 0 311 297
Electricity costs 13,496 9,634 10,407
Safety 1,155 998 774
Cash-settled share-based expense (note 12.1(a)) 637 853 692
On mine administration 2,783 2,736 1,806
Security 1,020 1,093 826
Solar operations and maintenance services 647 0 0
Obsolete inventory 283 563 36
Pre-feasibility exploration costs 441 172 304
Bilboes [member]      
Statement Line Items [Line Items]      
Production costs 13,118 0 0
Salaries and wages 2,796 0 0
Consumable materials 8,402 0 0
Electricity costs 553 0 0
Cash-settled share-based expense (note 12.1(a)) 23 0 0
On mine administration $ 1,344 $ 0 $ 0