Balance Sheet Components (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total property and equipment, gross	$ 134,182	$ 130,879
Accumulated depreciation	(120,847)	(114,799)
Total	13,335	16,080
Computer equipment
Total property and equipment, gross	9,979	10,550
Furniture, fixtures and leasehold improvements
Total property and equipment, gross	18,364	18,674
Software
Total property and equipment, gross	30,280	29,499
Machinery and equipment
Total property and equipment, gross	$ 75,559	$ 72,156