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Lease Arrangements - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Lessee Lease Description [Line Items]    
Right-of-use assets (Note 9) $ 1,306 $ 1,971
Operating lease expense 520 456
Office Premise    
Lessee Lease Description [Line Items]    
Right-of-use assets (Note 9) $ 1,306 $ 1,971
Minimum    
Lessee Lease Description [Line Items]    
Discount rates for lease liabilities 1.44% 1.44%
Minimum | Office Premise    
Lessee Lease Description [Line Items]    
Lease term 2 years  
Maximum    
Lessee Lease Description [Line Items]    
Discount rates for lease liabilities 2.80% 2.88%
Maximum | Office Premise    
Lessee Lease Description [Line Items]    
Lease term 5 years