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Marketable securities and short-term investments - Summary of Marketable Securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Marketable securities [Line Items]    
Additions   $ 3,846
Redemption $ (16,857) (2,007)
Interest received (324) (481)
Fair value adjustments $ 212 $ 1,116