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Business combinations - Summary of Accounts Payable From Acquisition of Subsidiaries (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of accounts payable from acquisition of subsidiaries [Abstract]      
Fixed installment—cash $ 1,470 $ 2,049  
Fixed installment—shares 0 203  
Earn-out—cash 2,790 323  
Earn-out—shares 0 194  
Earn-out—cash or shares 0 25  
Current 4,260 2,794  
Fixed installment—cash 0 1,206  
Earn-out—cash 2,163 0  
Earn-out—share 0 0  
Non-current 2,163 1,206  
Total $ 6,423 $ 4,000 $ 9,433