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Balance Sheet Details (Schedule of Inventories, Net) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Schedule of inventories    
Raw materials and purchased parts $ 13,291 $ 12,980
Work-in-process 3,037 858
Finished goods 17,463 19,492
Reserves (2,192) (1,082)
Total inventories, net $ 31,599 $ 32,248