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Balance Sheet Details - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Details [Abstract]    
Materials $ 108,492 $ 61,025
Work-in-process 42,694 21,910
Finished goods 24,948 13,885
Total inventories $ 176,134 $ 96,820