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Disaggregation of revenue - Summary of Disaggregation of Revenue by Transaction Model (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]    
Revenue $ 126,649 $ 111,630
Open marketplace transactions    
Disaggregation of Revenue [Line Items]    
Revenue 122,429 107,659
Private marketplace transactions    
Disaggregation of Revenue [Line Items]    
Revenue $ 4,220 $ 3,971