Balance Sheet Components (Schedule of Intangibles, Net) (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Gross	$ 126,944	$ 126,944
Accumulated Amortization	(121,554)	(116,840)
Net	5,390	10,104
Technology
Intangible Assets [Line Items]
Gross	59,799	59,799
Accumulated Amortization	(57,728)	(57,406)
Net	2,071	2,393
Customer contracts and relationships
Intangible Assets [Line Items]
Gross	56,800	56,800
Accumulated Amortization	(54,269)	(50,297)
Net	2,531	6,503
Other
Intangible Assets [Line Items]
Gross	10,345	10,345
Accumulated Amortization	(9,557)	(9,137)
Net	$ 788	$ 1,208