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BALANCE SHEET DETAILS (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Inventories:    
Raw materials $ 6,886 $ 4,127
Work in process 1,813 3,952
Finished goods(1) [1] 8,771 12,580
Total Inventory 17,470 20,659
Finished goods at customer sites $ 8,300 $ 11,600
[1] Includes finished goods at customer sites of approximately $8.3 million and $11.6 million at December 31, 2015 and 2014, respectively, for which the customer has taken possession, but based on specific contractual terms, title has not yet passed to the customer and for which revenue has not yet been recognized.