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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - Customer
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Concentration Risk [Line Items]          
Number of major customer represented stated percentage of total revenue 1 1 1 1  
Number of customers who accounted for accounts receivable balance     1   2
Concentration Risk, Customer     One customer represented 31% and 24% of net revenue for the three and six months ended June 30, 2014    
Net revenue | Customer Concentration Risk          
Concentration Risk [Line Items]          
Percentage concentration risk   31.00%   24.00%  
Net revenue | Customer Concentration Risk | Customer 1          
Concentration Risk [Line Items]          
Percentage concentration risk 13.00%        
Net revenue | Customer Concentration Risk | Customer 2          
Concentration Risk [Line Items]          
Percentage concentration risk     17.00%    
Accounts Receivable | Credit Concentration Risk          
Concentration Risk [Line Items]          
Percentage concentration risk     25.00%    
Accounts Receivable | Credit Concentration Risk | Customer 1          
Concentration Risk [Line Items]          
Percentage concentration risk         12.00%
Accounts Receivable | Credit Concentration Risk | Customer 2          
Concentration Risk [Line Items]          
Percentage concentration risk         12.00%