Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues		$ 2,394	$ 951
Cost of sales (exclusive of items shown separately below)		1,986	896
Gross profit		408	55
Operating expenses:
Engineering services		11,740	5,659
General and administrative costs		11,619	5,537
Research and development costs		8,281	304
Depreciation and amortization		1,100	614
Total operating expenses		32,740	12,114
Nonoperating Income (Expense) [Abstract]
Loss on remeasurement of warrant liabilities		(5,482)	0
Other income (expense), net		15	(28)
Total other loss, net		(5,467)	(28)
Loss before income tax expense		(37,799)	(12,087)
Income tax expense		104	1
Net loss before allocation to noncontrolling interest		(37,903)	(12,088)
Net loss attributable to noncontrolling interest		27,182	508
Net loss attributable to common stockholders		$ (10,721)	$ (11,580)
Net income (loss) per share of common stock attributable to common shareholders
Basic and diluted net loss per common share	[1]	$ (0.21)
Weighted average shares used in computing net income (loss) per share of common stock
Weighted Average Number of Shares Outstanding, Basic and Diluted	[1]	51,760,520

[1] (1) Earnings per share information has not been presented for periods prior to the Business Combination, as it resulted in values that would not be meaningful to the users of these condensed consolidated financial statements. Refer to Note 13 for further information.