Quarterly report pursuant to Section 13 or 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.20.2
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]          
Cash and cash equivalents $ 54,315   $ 54,315   $ 44,065
Depreciation Expense 264 $ 271 776 $ 822  
Cost of revenues 4,553 4,196 11,566 11,725  
Advertising Clients and Content Licensees [Member]          
Condensed Financial Statements, Captions [Line Items]          
Cash received 34,195   $ 34,195   $ 15,003
Advertising [Member]          
Condensed Financial Statements, Captions [Line Items]          
Percentage of average commission earned on amount invoiced and collected     15.00%    
Gross media placements 71,101 55,799 $ 180,297 158,370  
Advertising [Member] | Billed Revenues [Member]          
Condensed Financial Statements, Captions [Line Items]          
Gross media placements 66,187 51,429 166,877 147,989  
Advertising [Member] | Netted Against Billings [Member]          
Condensed Financial Statements, Captions [Line Items]          
Cost of revenues $ 59,058 $ 45,668 $ 148,668 $ 131,345