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BALANCE SHEET DETAILS - Components of Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2014
Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]    
Purchased parts and raw materials $ 29,005 $ 26,842
Work-in-process 8,025 4,260
Finished goods 1,518 3,024
Inventories, net $ 38,548 $ 34,126