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Geographic areas - Significant Customers (Details) - Revenue - Customer concentration risk
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Customer A        
Concentration Risk [Line Items]        
Concentration risk, percentage 17.00% 18.00% 15.00% 20.00%
Customer B        
Concentration Risk [Line Items]        
Concentration risk, percentage 14.00% 13.00% 14.00% 12.00%
Customer C        
Concentration Risk [Line Items]        
Concentration risk, percentage 11.00% 11.00% 10.00% 10.00%