Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Schedule of Inventories (Details)

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Balance Sheet Components - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials and work-in-progress $ 22,082 $ 24,980
Finished goods 3,017 2,756
Less: reserves (614) (665)
Inventories, net $ 24,485 $ 27,071