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Trade and Other Receivables - Disclosure Of Trade and Other Receivables (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Text Block [Abstract]    
Value-added and income tax receivables $ 29,076 $ 12,181
Trade receivables 17,172  
Due from Serabi Gold plc 6,429 12,033
Receivable from Inca One   2,716
Other receivables 3,195 460
Trade and other receivables $ 55,872 $ 27,390