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Significant Accounting Policies - Summary of Useful Lives of Intangible Assets (Details)
 12 Months Ended
Dec. 31, 2020
Software | Bottom of Range  
Disclosure Of Intangible Assets [Line Items]  
Intangible assets, useful lives 1 year
Software | Top of Range  
Disclosure Of Intangible Assets [Line Items]  
Intangible assets, useful lives 3 years
Industrial Property Rights  
Disclosure Of Intangible Assets [Line Items]  
Intangible assets, useful lives 10 years
Other Intangible Assets  
Disclosure Of Intangible Assets [Line Items]  
Intangible assets, useful lives 3 years