Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 30, 2022 shares	Jan. 31, 2022 shares	Jun. 30, 2022 USD ($) vote $ / shares shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) vote $ / shares shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 shares
Class of Stock [Line Items]
Vendor payments in shares in lieu of cash (in shares)			7,612,315		8,286,665
Vendor payments in stock in lieu of cash, liability | $			$ 27,600		$ 27,600
Compensation expense | $			38,625	$ 14,530	65,323	$ 16,367
Research and development
Class of Stock [Line Items]
Compensation expense | $			8,714	$ 5,663	15,816	$ 6,425
Daimler North America Corporation
Class of Stock [Line Items]
Prepaid expenses and other current assets related to stock-in-lieu of cash program | $			7,200		7,200
Daimler North America Corporation | Research and development
Class of Stock [Line Items]
Compensation expense | $			$ 1,900		$ 3,900
Public Warrants
Class of Stock [Line Items]
Warrants outstanding (in shares)							0
Private Warrants
Class of Stock [Line Items]
Warrants outstanding (in shares)			1,668,269		1,668,269		3,077,021
Warrants exercised (in shares)	19,223	1,389,529
Shares issued for exercise of warrants (in shares)	4,387	401,365
Share per warrant (in shares)			1		1
Stock price of warrants (in dollars per share) | $ / shares			$ 11.50		$ 11.50
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			715,000,000		715,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001		$ 0.0001
Common stock, shares issued (in shares)			282,211,653		282,211,653
Common stock, shares outstanding (in shares)			260,348,203		260,348,203
Common stock, votes per share | vote			1		1
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		121,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001		$ 0.0001
Common stock, shares issued (in shares)			97,088,670		97,088,670
Common stock, shares outstanding (in shares)			97,088,670		97,088,670
Common stock, votes per share | vote			10		10