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Summary Of Significant Accounting Policies - Estimated useful Lives of Intangible Assets (Detail)
12 Months Ended
Dec. 31, 2020
Licenses [Member]  
Significant Accounting Policies [Line Items]  
Estimated Useful Life 22 years
Brand [Member]  
Significant Accounting Policies [Line Items]  
Estimated Useful Life Indefinite
Computer Software [Member]  
Significant Accounting Policies [Line Items]  
Estimated Useful Life 5 years