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Financial instruments - Types of Financial Assets, Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Dec. 31, 2021
Financial instruments [Line Items]    
Proceeds from the sale of equity instruments $ 16,413  
Term deposit One    
Financial instruments [Line Items]    
Assets Pledged as Collateral   $ 31,430