Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.7.0.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
May 17, 2017
May 31, 2017
Mar. 31, 2017
Aug. 31, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Gross media placements         $ 31,243 $ 16,962 $ 57,485 $ 35,037  
Amortization of deferred debt discounts and issuance costs             $ 3,740    
Warrants to purchase common stock         1,277,157   1,277,157    
Warrants maturity period             4 years    
Fair market value of warrants                 $ 7,114
Initial Public Offering [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Warrants to purchase common stock 809,400   809,400            
Warrants maturity period 5 years   5 years            
Percentage of warrant exercise 10.00%   10.00%            
Acacia [Member] | Initial Public Offering [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Warrants to purchase common stock 809,400 809,400              
Warrants maturity period 5 years 5 years              
Percentage of warrant exercise 10.00% 10.00%              
Fair market value of warrants $ 5,790 $ 5,790              
Convertible Notes Payable [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Amortization of deferred debt discounts and issuance costs         $ 1,686   $ 3,740    
Convertible Notes Payable [Member] | Initial Public Offering [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Warrants to purchase common stock 154,311   154,311            
Convertible Notes Payable [Member] | Acacia [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Warrants maturity period       5 years          
Billed Revenues [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Gross media placements         28,784 14,585 48,207 29,608  
Netted Against Billings [Member]                  
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]                  
Gross media placements         $ 25,045 $ 12,647 $ 41,569 $ 25,634