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Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Intangible Assets [Line Items]    
Beginning balance $ 180  
Ending balance 129 $ 180
Gross carrying amount [Member]    
Disclosure Of Intangible Assets [Line Items]    
Beginning balance 743 621
Addition 4 67
Disposals (19)  
Transfer   40
Exchange difference (32) 15
Ending balance 696 743
Accumulated depreciation [Member]    
Disclosure Of Intangible Assets [Line Items]    
Beginning balance (563) (493)
Amortization (47) (62)
Disposals 19  
Exchange difference 24 (8)
Ending balance $ (567) $ (563)