Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of asset retirement obligations

	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning Balance	$	590		$	501
Liabilities incurred		185			55
Liabilities settled		(36	)		(37	)
Accretion		236			71
Ending Balance	$	975		$	590

Schedule of depreciation using the straight-line method over the estimated useful lives of the assets

Pinnacle and TerraPoiNT network assets	5–8 years
Office equipment, furniture and software	2–5 years
Leasehold improvements	Shorter of the useful life or lease term

Schedule of company’s revenue disaggregated by category and source

	Year Ended December 31,
	2021		2020
	(in thousands)
Commercial	$	400	$	—
Government contracts		303		416
Equipment sales		37		113
Other		23		40
Total revenue	$	763	$	569

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

	Year Ended December 31,
	2021		2020
	(in thousands)
Cost of goods sold	$	232	$	893
Research and development		621		1,994
Selling, general and administrative		822		4,476
Total stock-based compensation expense	$	1,675	$	7,363

Schedule of diluted weighted average shares

	Year Ended December 31,
	2021		2020
	(in thousands, except per share amounts)
Numerator
Net loss	$	144,666	$	137,336
Less cumulative change in redemption value of preferred units		13,831		33,072
Net loss attributable to common stockholders	$	158,497	$	170,408
Denominator
Weighted average shares – basic and diluted		23,561		7,346
Basic and diluted loss per share	$	6.73	$	23.20

Schedule of anti-dilutive unvested restricted stock units

	December 31,
Antidilutive Shares Excluded	2021		2020
	(in thousands)
Warrants		18,750		16,287
Stock Options		1,950		2,025
Unvested Restricted Stock Units		2,896		168
Unvested Restricted Stock Awards		1,070		—
Preferred units		—		47,652