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Select Condensed Consolidated Balance Sheet Details - Inventories, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 5,882 $ 7,301
Work-in-process 924 823
Finished goods 37,962 38,469
Inventory, gross, total 44,768 46,593
Less reserve for excess and obsolete finished goods (14,958) (16,500)
Inventories, net $ 29,810 $ 30,093