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Financial Statement Details - Summary of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finished goods $ 24,751 $ 14,797
Raw materials and components 4,641 11,634
Total inventories, net $ 29,392 $ 26,431