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Deposits and Advances to Contractors (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]    
Advance paid to contractors $ 934 $ 12,171
Decrease against longterm deposits 509  
Advances applied to Lindero construction and other expenditures 15,450 50,650
Lindero Project [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Advance paid to contractors 934 12,164
New Deposits Of Equipment and Advances [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Advance paid to contractors $ 4,729 $ 19,175