Balance Sheet Components (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Total property and equipment, gross	$ 130,879	$ 116,008
Accumulated depreciation and amortization	(114,799)	(98,325)
Total	16,080	17,683
Computer equipment
Total property and equipment, gross	10,550	9,883
Furniture, fixtures and leasehold improvements
Total property and equipment, gross	18,674	18,623
Software
Total property and equipment, gross	29,499	27,865
Machinery and equipment
Total property and equipment, gross	$ 72,156	$ 59,637