Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Property and Equipment

Property and equipment are stated at cost less accumulated depreciation and amortization, and are depreciated using the straight-line method over the estimated useful lives of the assets as follows:

Asset Category	Estimated useful lives
Machinery and equipment	5 to 7 years
Tooling	1 to 3 years
Computer hardware and software	3 to 5 years
Demonstration fleet and demonstration units	2 to 5 years
Leasehold improvements	Shorter of useful life or lease term
Vehicles	5 years
Furniture and fixtures	7 years

Property and equipment consisted of the following (in thousands):

	December 31,
	2021		2020
Machinery and equipment	$	7,694	$	5,940
Computer hardware and software	2,854		2,450
Demonstration fleet and demonstration units	811		1,821
Leasehold improvements	869		791
Vehicles	1,610		835
Furniture and fixtures	272		293
Construction in progress	3,677		1,410
Total property and equipment	17,787		13,540
Accumulated depreciation and amortization	(6,778)		(5,851)
Total property and equipment, net	$	11,009	$	7,689