Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Schedule of company’s revenue disaggregated by category and source

	Three Months Ended March 31,
	2022		2021
	(in thousands)
Commercial	$	1,180	$	-
Government contracts		10		251
Equipment sales		9		-
Total revenue	$	1,199	$	251

Schedule of stock-based compensation included in cost of goods sold, research and development, and selling, general and administrative expenses

	Three Months Ended March 31,
	2022		2021
	(in thousands)
Cost of goods sold	$	644	$	21
Research and development		1,794		145
Selling, general and administrative		4,757		219
Total stock-based compensation expense	$	7,195	$	385

Schedule of diluted weighted average shares

	Three Months Ended March 31,
	2022		2021
	(in thousands, except per share amounts)
Numerator
Net loss	$	9,711	$	27,068
Less: cumulative change in redemption value of preferred units		—		8,188
Net loss attributable to common stockholders	$	9,711	$	35,256
Denominator
Weighted average shares – basic and diluted		100,868		7,346
Basic and diluted loss per share	$	0.10	$	4.80

Schedule of anti-dilutive unvested restricted stock units

	March 31,
Antidilutive Shares Excluded	2022		2021
	(in thousands)
Warrants		18,750		17,667
Stock Options		2,500		2,047
Unvested Restricted Stock Units		3,399		145
Unvested Restricted Stock Awards		1,070		—
Preferred units		—		47,652