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Revenue (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of Revenue From Contracts with Customers [Abstract]  
Revenue from contracts with customers by product and segment
For the year ended December 31, 2019, revenue from contracts with customers by product and segment was as follows:
 
Turkey

 
Greece

 
Canada

 
Total

 
 
 
 
 
 
 
 
Gold revenue - doré
$
196,590

 
$
—

 
$
124,760

 
$
321,350

Gold revenue - concentrate
149,841

 
57,419

 
—

 
207,260

Silver revenue - doré
1,191

 
—

 
522

 
1,713

Silver revenue - concentrate
2,793

 
14,795

 
—

 
17,588

Lead concentrate
—

 
24,943

 
—

 
24,943

Zinc concentrate
—

 
43,067

 
—

 
43,067

Revenue from contracts with customers
$
350,415

 
$
140,224

 
$
125,282

 
$
615,921

Gain (loss) on revaluation of derivatives in trade receivables
1,970

 
(68
)
 
—

 
1,902

 
$
352,385

 
$
140,156

 
$
125,282

 
$
617,823


For the year ended December 31, 2018, revenue from contracts with customers by product and segment was as follows:
 
Turkey

 
Greece

 
Total

 
 
 
 
 
 
Gold revenue - doré
$
220,382

 
$
—

 
$
220,382

Gold revenue - concentrate
123,960

 
41,611

 
165,571

Silver revenue - doré
1,245

 
—

 
1,245

Silver revenue - concentrate
2,941

 
7,296

 
10,237

Lead concentrate
—

 
21,625

 
21,625

Zinc concentrate
—

 
39,564

 
39,564

Revenue from contracts with customers
$
348,528

 
$
110,096

 
$
458,624

Gain on revaluation of derivatives in trade receivables
—

 
392

 
392

 
$
348,528

 
$
110,488

 
$
459,016