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Current and deferred tax - Summary of Movement on Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning $ 2,174 $ 1,331
(Charged)/Credited To profit and loss (i) 10,211 843
To equity 187  
Balance Ending 12,572 2,174
Loss Allowances For Financial Assets [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 124 269
(Charged)/Credited To profit and loss (i) (49) (145)
Balance Ending 75 124
Bonus Provision [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 655 629
(Charged)/Credited To profit and loss (i) 95 26
Balance Ending 750 655
Lease [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 108 60
(Charged)/Credited To profit and loss (i) 258 48
Balance Ending 366 108
Sharebased compensation (ii) [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 185  
(Charged)/Credited To profit and loss (i) 2,852 185
To equity 187  
Balance Ending 3,224 185
Hyperinflationary Adjustments [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 99 57
(Charged)/Credited To profit and loss (i) (10) 42
Balance Ending 89 99
Tax Loss (iii) [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 427  
(Charged)/Credited To profit and loss (i) 6,018 427
Balance Ending 6,445 427
Others (iv) Assets [Member]    
Reconciliation Of Changes In Deferred Tax (Asset) [Line Items]    
Balance Beginning 576 316
(Charged)/Credited To profit and loss (i) 1,047 260
Balance Ending $ 1,623 $ 576