Balance Sheet Components (Schedule of Intangibles, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Intangible Assets [Line Items]
Gross	$ 126,944	$ 126,944
Accumulated Amortization	(125,615)	(125,088)
Net	1,329	1,856
Technology
Intangible Assets [Line Items]
Gross	59,799	59,799
Accumulated Amortization	(58,692)	(58,263)
Net	1,107	1,536
Customer contracts and relationships
Intangible Assets [Line Items]
Gross	56,800	56,800
Accumulated Amortization	(56,800)	(56,800)
Net	0	0
Other
Intangible Assets [Line Items]
Gross	10,345	10,345
Accumulated Amortization	(10,123)	(10,025)
Net	$ 222	$ 320