BALANCE SHEET DETAILS - Schedule of Components of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 27, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 67,403	$ 66,390
Less: accumulated depreciation	(58,401)	(58,154)
Property and equipment, net	9,002	8,236
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	41,913	41,463
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	8,635	8,531
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 16,855	$ 16,396