Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2022

Balance Sheet Related Disclosures [Abstract]

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,
	2022		2021
Prototype	$	17,641	$	17,730
Machine and equipment	19,068		17,701
Leasehold improvements	15,365		14,088
Furniture and fixtures	1,511		1,295
Software	1,389		1,389
Construction in progress	2,417		1,397
Property and equipment, gross	57,391		53,600
Less: accumulated depreciation and amortization	(37,750)		(33,358)
Property and equipment, net	$	19,641	$	20,242

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,
	2022		2021
Accrued payroll and related benefits	$	15,542	$	17,080
Accrued accounts payable	$	5,606	$	3,740
Payroll withholding tax, sales and other tax payable	$	1,660	$	1,094
Accrued legal and accounting	$	241	$	230
Product upgrade reserve	$	900	$	2,500
Other	$	733	$	1,911
Total accrued liabilities	$	24,682	$	26,555

Schedule of Deferred Revenue

Deferred revenue consisted of the following (in thousands):

	December 31,
	2022		2021
Deferred revenue:
Product	$	8,814	$	1,322
Services	18,057		15,385
Distribution rights	932		1,445
Total deferred revenue	27,803		18,152
Less: current portion of deferred revenue	(24,734)		(13,920)
Noncurrent portion of deferred revenue	$	3,069	$	4,232

Schedule of Other Long Term Liabilities

Other long-term liabilities consisted of the following (in thousands):

	December 31,
	2022		2021
Accrued interest, noncurrent portion	$	96	$	704
Asset retirement obligation	1,057		962
Other accrued costs	629		981
Total other-long term liabilities	$	1,782	$	2,647