Balance Sheet Components (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Total property and equipment, gross	$ 116,008	$ 116,108
Accumulated depreciation and amortization	(98,325)	(95,931)
Total	17,683	20,177
Computer equipment
Total property and equipment, gross	9,883	9,205
Furniture, fixtures and leasehold improvements
Total property and equipment, gross	18,623	18,286
Software
Total property and equipment, gross	27,865	28,065
Machinery and equipment
Total property and equipment, gross	$ 59,637	$ 60,552