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Balance Sheet Details Balance Sheet Details (Details 3) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory [Line Items]    
Inventory, Raw Materials, Net of Reserves $ 3,997 $ 2,583
Inventory, Work in Process, Net of Reserves 1,455 145
Inventory, Finished Goods, Net of Reserves 4,634 4,044
Inventories $ 10,086 $ 6,772