Simple Agreements for Future Equity (SAFE) (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 02, 2020	Jun. 24, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Charge for the increase in fair value					$ 24,200
Amount settled in cash			$ 0	$ 0	$ 5,609
Series A Convertible Preferred Stock
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Conversion of SAFE into Series A convertible preferred stock for cash, net of issuance costs (in shares)					68,877,417
Series A Convertible Preferred Stock | Preferred Stock
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Conversion of SAFE into Series A convertible preferred stock for cash, net of issuance costs (in shares)		68,877,417
Class A Common Stock | Common Stock
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Conversion of SAFE into Series A common stock or Issuance of Class A common stock upon exercise of warrants (in shares)	1,466,155	3,612,062	15,000,000	1,466,155	3,612,062