Annual report pursuant to Section 13 and 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.20.1
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]    
Depreciation Expense $ 1,087 $ 725
Cost of revenues $ 17,289 6,479
Advertising [Member]    
Condensed Financial Statements, Captions [Line Items]    
Percentage of average commission earned on amount invoiced and collected 15.00%  
Gross media placements $ 216,483 145,352
Advertising [Member] | Billed Revenues [Member]    
Condensed Financial Statements, Captions [Line Items]    
Gross media placements 200,709 121,143
Advertising [Member] | Netted Against Billings [Member]    
Condensed Financial Statements, Captions [Line Items]    
Cost of revenues $ 177,930 $ 105,737