Annual report pursuant to Section 13 and 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.19.1
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]    
Depreciation Expense $ 725 $ 52
Cost of revenues 6,479 1,070
Amortization of deferred debt discounts and issuance costs   3,740
Convertible Notes Payable [Member]    
Condensed Financial Statements, Captions [Line Items]    
Amortization of deferred debt discounts and issuance costs $ 3,740  
Advertising [Member]    
Condensed Financial Statements, Captions [Line Items]    
Percentage of average commission earned on amount invoiced and collected 15.00%  
Gross media placements $ 145,352 113,513
Advertising [Member] | Billed Revenues [Member]    
Condensed Financial Statements, Captions [Line Items]    
Gross media placements 121,143 95,989
Advertising [Member] | Netted Against Billings [Member]    
Condensed Financial Statements, Captions [Line Items]    
Cost of revenues $ 105,737 $ 83,040