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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - Customer
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Concentration Risk [Line Items]          
Number of major customer represented stated percentage of total net revenue 1 1 1 1  
Number of customers who accounted for more than 10% accounts receivable balance     1   1
Concentration Risk, Customer     One customer represented 27% of total revenue for the three and nine months ended September 30, 2014    
Total Net Revenue | Customer Concentration Risk          
Concentration Risk [Line Items]          
Percentage concentration risk 19.00% 27.00% 18.00% 27.00%  
Accounts Receivable | Credit Concentration Risk          
Concentration Risk [Line Items]          
Percentage concentration risk     10.00%   12.00%