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Balance Sheet Components - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials and work-in-progress $ 31,925 $ 31,676
Finished goods 5,085 5,174
Less: reserves (830) (1,186)
Inventories, net $ 36,180 $ 35,664