Warrants - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Jan. 01, 2021	Oct. 29, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	May 19, 2021	Mar. 19, 2021	Dec. 31, 2020
Warants [Line Items]
Common stock par value			$ 0.00001		$ 0.00001
Common stock surrendered				4,452,671
Adjustments to additional paid in capital, warrant issued			$ 58,041
Shares issued for vested and exercise of warrants					12,969,986
Common Stock [Member]
Warants [Line Items]
Class of Warrants or rights outstanding			0	3,611,226	0			27,751,587
Class of warrant or right number of securities of warrants or rights exercised	7,733,400
Proceeds from Issunace of warrants	$ 89,000
Stock issued during period Shares Coversion of convertible securities				4,907,329
Common stock par value			$ 11.50		$ 11.50	$ 0.00001
Class of warrant or exercise price of warrants or rights							$ 11.50
Common stock price surrender for exercise of warrants per warrant							0.5046
Public Warrants [Member]
Warants [Line Items]
Class of Warrants or rights outstanding			18,400,000		18,400,000
Redemption of unexercised warrants					$ 2,259
Class of warrant or right redemption price of warrants or rights1			$ 0.01		$ 0.01
Class of warrant or exercise price of warrants or rights							11.50
Adjustments to additional paid in capital, warrant issued			$ 24,000
Public Warrants [Member] | Redemption Date [Member]
Warants [Line Items]
Class of Warrants or rights outstanding			225,906		225,906
Public Warrants [Member] | Common Stock [Member]
Warants [Line Items]
Class of Warrants or rights outstanding			0	3,611,226	0			18,391,587
Non cash or part non cash acquisition equity consideration share price received for warrant surrendered exercise price							$ 0.4954
Private Placement [Member]
Warants [Line Items]
Class of Warrants or rights outstanding			9,360,000		9,360,000
Adjustments to additional paid in capital, warrant issued					$ 277,000
Private Placement [Member] | Spartan Energy Acquisition Corp [Member]
Warants [Line Items]
Number of warrants exercised				9,360,000
Magna Warrants [Member]
Warants [Line Items]
Class of warrant or exercise price of warrants or rights		$ 0.01
Class of warrant or right number of warrants granted		19,474,454
Proportion of equity ownership interest in subsidiary		6.00%
Exercise vested warrants expire date		Oct. 29, 2030
Non cash increases of intangible assets and additional paid in capital			$ 58,000
Capitalized costs incurred on intangible assets represents Future Economic Benefit			$ 116,000