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Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]          
Cash and cash equivalents $ 120,627   $ 120,627   $ 114,817
Write-off of property and equipment and leasehold improvements     3,559    
Loss on disposal     1,894    
Depreciation Expense 78 $ 256 253 $ 512  
Advertising Clients and Content Licensees [Member]          
Condensed Financial Statements, Captions [Line Items]          
Cash received $ 48,226   $ 48,226   $ 40,052
Advertising [Member]          
Condensed Financial Statements, Captions [Line Items]          
Percentage of average commission earned on amount invoiced and collected     15.00%