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Current and deferred tax - Summary of Movement on Deferred Tax Liabilities (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of changes in deferred tax liabilities [Line Items]    
Charged/(Credited) to profit and loss $ 5,080 $ 10,211
Deferred tax liabilities [Member]    
Reconciliation of changes in deferred tax liabilities [Line Items]    
Balance Beginning 2,045 731
Acquisition of subsidiaries   1,548
Charged/(Credited) to profit and loss 419 (234)
Balance Ending 2,464 2,045
Deferred tax liabilities [Member] | Goodwill [member]    
Reconciliation of changes in deferred tax liabilities [Line Items]    
Balance Beginning 283 187
Acquisition of subsidiaries   0
Charged/(Credited) to profit and loss 544 96
Balance Ending 827 283
Deferred tax liabilities [Member] | Customer relationship [Member]    
Reconciliation of changes in deferred tax liabilities [Line Items]    
Balance Beginning 1,464 325
Acquisition of subsidiaries   1,424
Charged/(Credited) to profit and loss (218) (285)
Balance Ending 1,246 1,464
Deferred tax liabilities [Member] | Intellectual property [member]    
Reconciliation of changes in deferred tax liabilities [Line Items]    
Balance Beginning 223 219
Acquisition of subsidiaries   65
Charged/(Credited) to profit and loss (60) (61)
Balance Ending 163 223
Deferred tax liabilities [Member] | Others [Member]    
Reconciliation of changes in deferred tax liabilities [Line Items]    
Balance Beginning 75 0
Acquisition of subsidiaries   59
Charged/(Credited) to profit and loss 153 16
Balance Ending $ 228 $ 75