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Balance Sheet Details - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finished goods $ 34,539 $ 33,045
Raw materials and components 5,658 4,758
Total inventory $ 40,197 $ 37,803