Annual report pursuant to Section 13 and 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.20.4
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]    
Cash and cash equivalents $ 114,817 $ 44,065
Depreciation Expense 1,025 1,087
Disposal of property, equipment, and improvements 34  
Loss on disposal 10  
Cost of revenues 15,663 15,261
Advertising Clients and Content Licensees [Member]    
Condensed Financial Statements, Captions [Line Items]    
Cash received $ 40,052 15,003
Advertising [Member]    
Condensed Financial Statements, Captions [Line Items]    
Percentage of average fee earned on amount invoiced and collected 15.00%  
Gross media placements $ 257,817 216,483
Advertising [Member] | Billed Revenues [Member]    
Condensed Financial Statements, Captions [Line Items]    
Gross media placements 237,883 200,709
Advertising [Member] | Netted Against Billings [Member]    
Condensed Financial Statements, Captions [Line Items]    
Cost of revenues $ 212,273 $ 177,930