Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2023

Summary of Significant Accounting Policies

Schedule of company’s revenue disaggregated by category and source

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in thousands)				(in thousands)
Commercial	$	945	$	488	$	2,565	$	2,970
Government contracts		5		7		15		24
Equipment sales		77		8		77		129
Total revenue	$	1,027	$	503	$	2,657	$	3,123

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in thousands)				(in thousands)
Cost of goods sold	$	561	$	531	$	1,705	$	1,714
Research and development		1,843		1,415		5,201		4,715
Selling, general and administrative		2,003		4,689		5,737		14,164
Total stock-based compensation expense	$	4,407	$	6,635	$	12,643	$	20,593

Schedule of diluted weighted average shares

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
	(in thousands, except per share amounts)
Numerator
Net loss attributable to common stockholders	$	(23,220	)	$	(18,730	)	$	(55,339	)	$	(27,614	)
Denominator
Weighted average shares – basic and diluted		108,045			101,397			107,504			98,513
Basic and diluted loss per share	$	(0.21	)	$	(0.18	)	$	(0.51	)	$	(0.28	)

Schedule of anti-dilutive unvested restricted stock units and unvested restricted stock awards

	Three Months Ended September 30,				Nine Months Ended September 30,
Antidilutive Shares Excluded	2023		2022			2023	2022
	(in thousands)				(in thousands)
Warrants		44,268		18,750		44,268	18,750
Stock Options		3,667		2,374		3,667	2,374
Unvested Restricted Stock Units		3,500		3,294		3,500	3,294
Unvested Restricted Stock Awards		334		1,262		334	1,262

Schedule of goodwill activities

Goodwill - January 1, 2023	$	17,493
Changes in foreign exchange rates		(159	)
Purchase price adjustment		(96	)
Goodwill - September 30, 2023	$	17,238