Registration statement for securities of certain foreign private issuers

Fair value measurement - Summary of Unobservable Input Parameters Used in The Valuation Model (Parenthetical) (Detail)

v3.22.1
Fair value measurement - Summary of Unobservable Input Parameters Used in The Valuation Model (Parenthetical) (Detail) - Purchase Options [Member]
Dec. 31, 2021
Unlisted Software Company [Member] | Historical volatility for shares, measurement input [member]  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]  
Changes to parameters increase percentage 5.00%
Changes to parameters decrease percentage 5.00%
Unlisted Software Company [Member] | Spot Price Per Share [Member]  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]  
Changes to parameters increase percentage 20.00%
Changes to parameters decrease percentage 20.00%
Mega E [Member] | Historical volatility for shares, measurement input [member]  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]  
Changes to parameters increase percentage 30.00%
Changes to parameters decrease percentage 30.00%
Mega E [Member] | Spot Price Per Share [Member]  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]  
Changes to parameters increase percentage 20.00%
Changes to parameters decrease percentage 20.00%