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Significant Accounting Policies - Summary of Advertising Business Exceeding (Detail) - Accounts Receivable [Member] - Customer Concentration Risk [Member] | 12 Months Ended
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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%

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