Quarterly report pursuant to Section 13 or 15(d)

Consolidated Financial Statements Details - Additional Information (Detail)

v3.8.0.1
Consolidated Financial Statements Details - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Condensed Financial Statements, Captions [Line Items]    
Depreciation Expense $ 49 $ 52
Gross media placements 29,420 26,723
Cost of revenues 564 196
Amortization of deferred debt discounts and issuance costs   2,054
Convertible Notes Payable [Member]    
Condensed Financial Statements, Captions [Line Items]    
Amortization of deferred debt discounts and issuance costs   2,054
Billed Revenues [Member]    
Condensed Financial Statements, Captions [Line Items]    
Gross media placements 25,573 19,423
Netted Against Billings [Member]    
Condensed Financial Statements, Captions [Line Items]    
Cost of revenues $ 22,510 $ 16,524