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Select Condensed Consolidated Balance Sheet Details - Inventories, Net (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 5,664 $ 7,301
Work-in-process 969 823
Finished goods 38,538 38,469
Inventory, gross, total 45,171 46,593
Less reserve for excess and obsolete finished goods (15,083) (16,500)
Inventories, net $ 30,088 $ 30,093