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COMMITMENTS AND CONTINGENCIES: - Labor matters (Details) - Peru - Labor Matters
 9 Months Ended 12 Months Ended
Sep. 30, 2022
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employee
Dec. 31, 2021
PEN (S/)
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Dec. 31, 2021
USD ($)
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Labor matters      
Percentage of labor unionized 71.70%    
Total number of workers | employee 4,544    
Number of labor unions 6    
Number of labor unions represent majority of workers 0    
Extended term of agreement   6 years 6 years
Annual salary increase (as a percent)   5.00% 5.00%
Number of labor unions of collective agreement signed   6 6
Long term agreement bonus   S/ 10,000 $ 2,611
Minimum      
Labor matters      
Term of agreement   3 years 3 years
Labor expense   S/ 45,000 $ 11,749
Maximum      
Labor matters      
Term of agreement   6 years 6 years
Labor expense   S/ 90,000 $ 23,499