XML 174 R148.htm IDEA: XBRL DOCUMENT v3.20.4
Other current and non-current non-financial assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets $ 57,399 $ 50,552
Other non-current non-financial assets 22,042 19,729
Domestic Value Added Tax [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 18,107 17,807
Foreign Value Added Tax [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 7,785 8,566
Prepaid mining licenses [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 1,025 1,244
Prepaid insurance [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 10,307 7,135
Other prepayment [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 946 1,423
Refund of Value Added Tax to exporters [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 14,316 10,560
Other taxes [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 4,499 3,213
Other assets [Member]    
Disclosure of other non-financial assets [Line Items]    
Other current non-financial assets 414 604
Other non-current non-financial assets 3,428 524
Exploration and evaluation expenses [Member]    
Disclosure of other non-financial assets [Line Items]    
Other non-current non-financial assets 17,883 18,654
Guarantee deposits [Member]    
Disclosure of other non-financial assets [Line Items]    
Other non-current non-financial assets $ 731 $ 551