BALANCE SHEET DETAILS - Schedule of Components of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 27, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 66,682	$ 67,502
Less: accumulated depreciation	(57,928)	(59,968)
Property and equipment, net	8,754	7,534
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	41,600	40,777
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	8,612	9,079
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 16,470	$ 17,646