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Significant Accounting Policies - Summary of Depreciation Method of Right of Use Assets (Detail)
 12 Months Ended
Dec. 31, 2019
Office equipment [member] | Bottom of range [member]  
Disclosure of quantitative information about right-of-use assets [line items]  
Estimated useful lives (years) 1 years
Office equipment [member] | Top of range [member]  
Disclosure of quantitative information about right-of-use assets [line items]  
Estimated useful lives (years) 10 years
Vehicles [member] | Bottom of range [member]  
Disclosure of quantitative information about right-of-use assets [line items]  
Estimated useful lives (years) 1 years
Vehicles [member] | Top of range [member]  
Disclosure of quantitative information about right-of-use assets [line items]  
Estimated useful lives (years) 3 years
Software [member]  
Disclosure of quantitative information about right-of-use assets [line items]  
Estimated useful lives (years) 3 years