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Marketable securities and short-term investments - Summary of Marketable Securities and Short term Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Marketable securities and shortterm investments [Line Items]      
Marketable securities   $ 16,969 $ 14,495
Short-term investments $ 177,191    
Marketable securities and short-term investments $ 177,191 $ 16,969