Income Taxes (Details Narrative 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating loss and tax credit carryforwards
Unrecognized tax benefits	$ 134,044	$ 115,653	$ 23,482	$ 22,652
State and local tax authority | California Franchise Tax Board
Operating loss and tax credit carryforwards
Operating loss carryforwards	202,200
Tax credit carryforwards, alternative minimum tax credit	200
State and local tax authority | Other
Operating loss and tax credit carryforwards
Operating loss carryforwards	35,800
Research and development tax credit carryforward | Federal
Operating loss and tax credit carryforwards
Tax credit carryforwards	38,800
Research and development tax credit carryforward | State and local tax authority | California Franchise Tax Board
Operating loss and tax credit carryforwards
Tax credit carryforwards	30,300
Foreign tax credit
Operating loss and tax credit carryforwards
Tax credit carryforwards	123,500
Foreign tax credit | Federal
Operating loss and tax credit carryforwards
Tax credit carryforward, subject to expiration	$ 9,900