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COMMITMENTS AND CONTINGENCIES: - Labor matters (Details) |  | 1 Months Ended | 9 Months Ended |
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Jul. 22, 2021 PEN (S/) | Jul. 22, 2021 USD ($) | Dec. 31, 2021 | Sep. 30, 2021 USD ($) item | Jun. 30, 2021 PEN (S/) | Jun. 30, 2021 USD ($) | Sep. 30, 2021 USD ($) item employee | Jul. 12, 2021 item
Peru | Labor Matters |  |  |  |  |  |  |  |
Labor matters |  |  |  |  |  |  |  |
Percentage of labor unionized |  |  |  | 70.40% |  |  | 70.40% |
Total number of workers | employee |  |  |  |  |  |  | 4,645 |
Number of labor unions |  |  |  |  |  |  | 6 |
Number of labor unions represent majority of workers |  |  |  |  |  |  | 1 |
Number of labor unions other than majority workers unions |  |  |  |  |  |  | 5 |
Term of agreement |  |  |  |  | 4 years | 4 years |  |
Extended term of agreement | 6 years | 6 years |  |  |  |  |  |
Annual salary increase (as a percent) |  |  | 5.00% | 5.00% |  |  |  |
Labor expense | S/ 90,000 | $ 21,760 |  |  | S/ 60,000 | $ 14,507 |  |
Number of labor unions of collective agreement signed |  |  |  |  |  |  |  | 2
Long term agreement bonus | S/ 10,000 | $ 2,418 |  |  |  |  |  |
Number of unions decided to forego advancing conversation |  |  |  | 6 |  |  | 6 |
Mexico | San Martin |  |  |  |  |  |  |  |
Labor matters |  |  |  |  |  |  |  |
Budgeted cost for rehabilitation of mine | $ |  |  |  | $ 90,100,000 |  |  | $ 90,100,000 |

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- Definition Number of labor unions with whom extension of collective agreement is signed. + References No definition available. + Details
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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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