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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - Customer
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Credit Concentration Risk [Member]      
Revenue, Major Customer [Line Items]      
Number of customers representing 17% or more of gross accounts receivable 1    
Number of customers representing 21% or more of gross accounts receivable     1
Revenue [Member] | Customer Concentration Risk [Member]      
Revenue, Major Customer [Line Items]      
Minimum percentage of revenue or gross accounts receivable balance required to be significant customers 14.00%    
Number of customers representing 10% or more of revenue   0  
Accounts Receivable | Credit Concentration Risk [Member]      
Revenue, Major Customer [Line Items]      
Minimum percentage of revenue or gross accounts receivable balance required to be significant customers 17.00%   21.00%