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Mine standby costs (Tables)
12 Months Ended
Dec. 31, 2021
Analysis of income and expense [abstract]  
Summary of Mine Standby Costs
December 31, 2021December 31, 2020
Stratoni$7,168 $— 
Skouries5,785 8,890 
Lamaque— 3,086 
Other mine standby costs2,480 1,689 
$15,433 $13,665