Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Concentration of Risk

The Company’s customers representing greater than 10% of accounts receivable or revenue for the periods presented were as follows:

	Revenue						Accounts Receivables
	Year Ended December 31,						December 31,
Customers	2021		2020		2019		2021		2020
Customer A	11	%	12	%	14	%	28	%
Customer B							16	%
Customer C							16	%
Customer D							15	%
Customer E			19	%
Customer F			11	%					30	%
Customer G			10	%					20	%
Customer H									25	%

Schedule of Property and Equipment, Net

Depreciation and amortization periods for property and equipment are as follows:

Property and Equipment	Estimated Useful Life
Prototype	2 - 10 years
Machinery and equipment	3 - 15 years
Furniture and fixture	5 - 10 years
Software	3 years
Leasehold improvements	Lesser of estimated useful life or remaining lease term

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

	December 31,
	2021		2020
Prototype	$	17,730	$	17,711
Machine and equipment	17,701		17,486
Leasehold improvements	14,088		14,196
Furniture and fixtures	1,295		1,295
Software	1,389		1,389
Construction in progress	1,397		486
Property and equipment, gross	53,600		52,563
Less: accumulated depreciation and amortization	(33,358)		(28,501)
Property and equipment, net	$	20,242	$	24,062