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Revenue
 12 Months Ended
Dec. 31, 2021
Disclosure of Revenue From Contracts with Customers [Abstract]  
Revenue
30. Revenue
For the year ended December 31, 2021, revenue from contracts with customers by product and segment was as follows:
TurkeyCanadaGreeceTotal
Gold revenue - doré$316,245 $271,696 $— $587,941 
Gold revenue - concentrate162,145 — 90,418 252,563 
Silver revenue - doré3,095 1,662 — 4,757 
Silver revenue - concentrate4,270 — 24,298 28,568 
Lead concentrate— — 26,781 26,781 
Zinc concentrate— — 42,864 42,864 
Revenue from contracts with customers$485,755 $273,358 $184,361 $943,474 
Gain (loss) on revaluation of derivatives in trade receivables314 — (2,874)(2,560)
$486,069 $273,358 $181,487 $940,914 

For the year ended December 31, 2020, revenue from contracts with customers by product and segment was as follows:
TurkeyCanadaGreeceTotal
Gold revenue - doré$403,823 $256,069 $— $659,892 
Gold revenue - concentrate181,727 — 100,928 282,655 
Silver revenue - doré2,194 1,198 — 3,392 
Silver revenue - concentrate3,981 — 24,029 28,010 
Lead concentrate— — 18,285 18,285 
Zinc concentrate— — 36,993 36,993 
Revenue from contracts with customers$591,725 $257,267 $180,235 $1,029,227 
Gain (loss) on revaluation of derivatives in trade receivables(3,537)— 995 (2,542)
$588,188 $257,267 $181,230 $1,026,685