BALANCE SHEET DETAILS - Components of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 67,256	$ 70,863
Less: accumulated depreciation	(58,393)	(61,647)
Property and equipment, net	8,863	9,216
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	39,804	42,329
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	9,547	9,908
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 17,905	$ 18,626