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Balance Sheet Components (Components Of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Balance Sheet Components [Abstract]    
Purchased materials $ 4,817 $ 4,041
Work in process 7,287 3,576
Finished goods 3,530 3,338
Inventory $ 15,634 $ 10,955