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Disaggregated revenue - Schedule (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
revenue_source
Dec. 31, 2019
USD ($)
Revenue From Contracts With Customers [Abstract]    
Number of sources of revenues | revenue_source 2  
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue (Note 16) $ 62,917 $ 41,443
Subscription revenue    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue (Note 16) 57,415 37,283
Professional services    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue (Note 16) $ 5,502 $ 4,160