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Inventories | 12 Months Ended
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Dec. 31, 2020
Classes of current inventories [abstract] |
Inventories | 8. Inventories
| December 31, 2020 |  | December 31, 2019
Ore stockpiles | $ | 6,327 |  |  | $ | 3,859 |
In-process inventory and finished goods | 81,120 |  |  | 81,282 |
Materials and supplies | 88,824 |  |  | 78,093 |
| $ | 176,271 |  |  | $ | 163,234 |
In 2020, inventories of $367,310 (2019 – $296,218) were recognized as an expense during the year and included in cost of sales. During the year ended December 31, 2020, charges of $2,122 and $206 were recognized in production costs and depreciation, respectively, to reduce the cost of lead and zinc concentrate inventory at Stratoni to net realizable value. During the year ended December 31, 2019, charges of $632 and $1,894 were recognized in production costs and depreciation, respectively, to reduce the cost of lead, zinc and gold concentrate inventory at Olympias and Stratoni to net realizable value.

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2020-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2020-en-r&doctype=Standard&dita_xref=IAS02_g36-39_TI -URIDate 2020-01-01 + Details
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