Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2022 shares	Mar. 31, 2022 USD ($) vote $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 shares
Class of Stock [Line Items]
Vendor payments in shares in lieu of cash (in shares)		674,350
Vendor payments in stock in lieu of cash, liability | $		$ 2,500
Compensation expense | $		26,698	$ 1,837
Daimler North America Corporation
Class of Stock [Line Items]
Prepaid expenses and other current assets related to stock-in-lieu of cash program | $		9,200
Research and development
Class of Stock [Line Items]
Compensation expense | $		7,102	$ 762
Research and development | Daimler North America Corporation
Class of Stock [Line Items]
Compensation expense | $		$ 2,000
Public Warrants
Class of Stock [Line Items]
Warrants outstanding (in shares)				0
Private Warrants
Class of Stock [Line Items]
Warrants outstanding (in shares)		1,687,492		3,077,021
Warrants exercised (in shares)	1,389,529
Shares issued for exercise of warrants (in shares)	401,365
Share per warrant (in shares)		1
Stock price of warrants (in dollars per share) | $ / shares		$ 11.50
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		715,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001
Common stock, shares issued (in shares)		269,978,536
Common stock, shares outstanding (in shares)		269,978,536
Common stock, votes per share | vote		1
Shares issued for exercise of warrants (in shares)		401,365
Class A Common Stock | Daimler North America Corporation
Class of Stock [Line Items]
Vendor payments in shares in lieu of cash (in shares)		1,500,000
Award vesting period (in years and in months)		2 years
Shares issued in period (in shares)		750,000
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		121,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001
Common stock, shares issued (in shares)		97,088,670
Common stock, shares outstanding (in shares)		97,088,670
Common stock, votes per share | vote		10