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Balance Sheet Details - Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 8,765 $ 6,829
Work-in-process 1,698 2,442
Finished goods 10,375 8,653
Inventories $ 20,838 $ 17,924