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Cost of Sales (Schedule of Cost of Sales) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items] |  |
Direct mining costs | $ 94,609 | $ 101,734
Salaries and benefits | 16,586 | 15,040
Workers' Participation | 7,459 | 6,011
Depletion and depreciation | 43,778 | 44,358
Royalties | 6,318 | 4,135
Impairment of inventories |  | 1,328
Reversal of inventory write-down | (5) |
Cost of sales | 168,745 | 172,606
Depletion and depreciation, right-of-use | 2,542 | 2,262
Caylloma M&I Property [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Direct mining costs | 31,738 | 35,712
Salaries and benefits | 6,883 | 7,557
Workers' Participation | 899 | 717
Depletion and depreciation | 14,301 | 13,621
Royalties | 523 | 750
Impairment of inventories | 13 | 93
Cost of sales | 54,357 | 58,450
San Jose M&I Property [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Direct mining costs | 58,726 | 66,022
Salaries and benefits | 6,902 | 7,483
Workers' Participation | 6,560 | 5,294
Depletion and depreciation | 27,856 | 30,737
Royalties | 4,289 | 3,385
Impairment of inventories |  | 1,235
Reversal of inventory write-down | (18) |
Cost of sales | 104,315 | $ 114,156
Lindero Project [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Direct mining costs | 4,145 |
Salaries and benefits | 2,801 |
Depletion and depreciation | 1,621 |
Royalties | 1,506 |
Cost of sales | $ 10,073 |

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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_99&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_103&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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