Balance Sheet Components (Schedule of Intangibles, Net) (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Gross	$ 126,944	$ 126,944
Accumulated Amortization	(120,029)	(116,840)
Net	6,915	10,104
Technology
Intangible Assets [Line Items]
Gross	59,799	59,799
Accumulated Amortization	(57,621)	(57,406)
Net	2,178	2,393
Customer contracts and relationships
Intangible Assets [Line Items]
Gross	56,800	56,800
Accumulated Amortization	(52,978)	(50,297)
Net	3,822	6,503
Other
Intangible Assets [Line Items]
Gross	10,345	10,345
Accumulated Amortization	(9,430)	(9,137)
Net	$ 915	$ 1,208