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Operating Segment Information - Additional Information (Detail) - Property Plant And Equipment Goodwill Intangible Assets Other Than Goodwill [Member] - HKD ($)
Dec. 31, 2022
Dec. 31, 2021
Europe [Member]    
Disclosure of operating segments [line items]    
Non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets, and rights arising under insurance contracts $ 724,254,000 $ 0
HONG KONG    
Disclosure of operating segments [line items]    
Non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets, and rights arising under insurance contracts 66,000 15,238,000
SINGAPORE    
Disclosure of operating segments [line items]    
Non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets, and rights arising under insurance contracts $ 90,577,000 $ 0