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Revenue from services provided - Summary of Disaggregation of revenue by Major Product Lines (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers $ 125,773 $ 98,676 $ 61,327
Subscription cost [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contract with customer including assessed tax 129,292 100,611 63,163
Revenue from contract with customer assessed tax (10,826) (7,245) (4,874)
Revenue from contracts with customers 118,466 93,366 58,289
Services cost [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contract with customer including assessed tax 8,154 5,599 3,329
Revenue from contract with customer assessed tax (847) (289) (291)
Revenue from contracts with customers $ 7,307 $ 5,310 $ 3,038