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Related Party Transactions - Summary of Detailed Information About Compensation Of Key Management Personnel (Detail) - HKD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Detailed Information About Compensation Of Key Management Personnel [Line Items]      
Short-term employee benefits $ 33,320,024 $ 22,426,846 $ 32,692,568
Other long-term benefit 99,750 55,200 54,745
Total benefits $ 33,419,774 $ 22,482,046 $ 32,747,313