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Financial Statement Details - Summary of Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finished goods $ 18,994 $ 14,797
Raw materials and components 14,294 11,634
Total inventories, net $ 33,288 $ 26,431