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Significant Accounting Policies - Summary of Advertising Business Exceeding (Detail) - Accounts Receivable [Member] - Customer Concentration Risk [Member]
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Customer A [Member]    
Disclosure of Advertising and Promotional Service Providers [Line Items]    
Concentration risk, percentage 87.30% 68.30%
Customer B [Member]    
Disclosure of Advertising and Promotional Service Providers [Line Items]    
Concentration risk, percentage 0.00% 21.50%