Quarterly report pursuant to Section 13 or 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.19.2
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]        
Depreciation Expense $ 263 $ 167 $ 555 $ 215
Cost of revenues 4,562 820 $ 8,434 1,384
Advertising [Member]        
Condensed Financial Statements, Captions [Line Items]        
Percentage of average commission earned on amount invoiced and collected     15.00%  
Gross media placements 52,973 31,451 $ 103,755 60,872
Advertising [Member] | Billed Revenues [Member]        
Condensed Financial Statements, Captions [Line Items]        
Gross media placements 48,676 26,322 97,744 51,895
Advertising [Member] | Netted Against Billings [Member]        
Condensed Financial Statements, Captions [Line Items]        
Cost of revenues $ 43,125 $ 23,014 $ 86,712 $ 45,464