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Balance Sheet Components - Inventories, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Raw materials $ 70,555 $ 67,829  
Work-in-progress 25,075 21,207  
Finished goods 16,849 20,570  
Inventory, net 112,479 109,606 $ 106,889
Inventory reserves 14,000 14,600  
Other inventory at off site premises $ 24,000 $ 14,600