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Deferred Consideration - Summary of valuation of deferred consideration (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Disclosure Of Valuation Of Deferred Consideration [Line Item]    
Discount rate 13.30% 11.00%
Perpetual growth rate 1.50% 1.30%
Minimum [Member]    
Disclosure Of Valuation Of Deferred Consideration [Line Item]    
Forward-looking gold price $ 1,999 $ 1,858
Maximum [Member]    
Disclosure Of Valuation Of Deferred Consideration [Line Item]    
Forward-looking gold price 3,567 3,126
Weighted Average [Member]    
Disclosure Of Valuation Of Deferred Consideration [Line Item]    
Forward-looking gold price $ 2,401 $ 2,237