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Capital and Financial Risk Management - Credit Risk (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Capital And Financial Risk Management [Abstract]        
Cash and cash equivalents $ 191,081 $ 149,866 $ 465,708 $ 403,881
Short-term investments 136,062 200,229    
Trade and other receivables 2,376 11,867    
Total $ 329,518 $ 361,961