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Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Detail)
 12 Months Ended
Dec. 31, 2019
Software [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 5 years
Customer relationship [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 10 years
Licenser for use [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 5 years
Bottom of range [member] | Trademark [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 1 years
Top of range [member] | Trademark [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 2 years