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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Condensed Financial Statements, Captions [Line Items]        
Depreciation Expense $ 256 $ 263 $ 512 $ 555
Cost of revenues 4,325 4,562 $ 8,136 8,434
Advertising [Member]        
Condensed Financial Statements, Captions [Line Items]        
Percentage of average commission earned on amount invoiced and collected     15.00%  
Gross media placements 54,524 52,973 $ 109,248 103,755
Advertising [Member] | Billed Revenues [Member]        
Condensed Financial Statements, Captions [Line Items]        
Gross media placements 50,697 48,676 100,743 97,744
Advertising [Member] | Netted Against Billings [Member]        
Condensed Financial Statements, Captions [Line Items]        
Cost of revenues $ 45,011 $ 43,125 $ 89,646 $ 86,712