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Acquisition of Rivierawaves - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Jul. 04, 2014
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Estimated contingent consideration       $ 3,603
RivieraWaves        
Business Acquisition [Line Items]        
Percentage of voting interests acquired   100.00%    
Cost of acquired entity, purchase price   $ 18,378    
Cost of acquired entity cash paid at closing   14,678    
Business acquisition, description of contingent consideration arrangements     The remaining amount of $3,700 payable upon the satisfaction of certain milestones (the "Contingent Consideration").  
Business acquisition, contingent consideration liability   3,700    
Estimated contingent consideration       $ 3,603
Contingent consideration paid     $ 3,700  
Business acquisition, acquisition-related costs   310    
Business acquisition, description of acquired entity     In addition, as part of the acquisition, the Company established an employee retention plan for the RivieraWaves employees at a cost of approximately $3,400, to be payable on a semiannual basis for a period of two years after the Closing Date.  
Employee retention plan cost   $ 3,400    
Payment for employee retention $ 971      
Employee retention plan payment period   2 years