Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Valuation allowance, period increase (decrease)	$ 589,000	$ 57,900	$ 18,200
Unrecognized tax benefits	72,919	19,386	10,121	$ 6,111
Unrecognized tax benefits, income tax penalties and interest accrued	0	0	0
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	0	$ 0	$ 0
Domestic Tax Authority | Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,120,800
Domestic Tax Authority | Federal | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Research and development tax credit	84,700
Domestic Tax Authority | Federal | Operating Loss Carryforwards, Not Subject to Expiration
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,035,200
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	840,100
State and Local Jurisdiction | California Franchise Tax Board | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Research and development tax credit	60,400
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 49,600