BALANCE SHEET COMPONENTS (Tables)

3 Months Ended

Mar. 31, 2023

Balance Sheet Related Disclosures [Abstract]

Property and Equipment, Net

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

	March 31, 2023		December 31, 2022
Prototype	$	17,641	$	17,641
Machinery and equipment	19,068		19,068
Leasehold improvements	15,365		15,365
Furniture and fixtures	1,511		1,511
Software	1,389		1,389
Construction in progress	2,775		2,417
Property and equipment, gross	57,749		57,391
Less: accumulated depreciation and amortization	(38,710)		(37,750)
Property and equipment, net	$	19,039	$	19,641

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	March 31, 2023		December 31, 2022
Accrued payroll and related benefits	$	12,622	$	15,542
Accrued accounts payable	4,917		5,606
Payroll withholding tax, sales and other tax payable	1,352		1,660
Accrued legal, accounting and professional fees	202		241
Product upgrade reserve	900		900
Other	766		733
Total accrued liabilities	$	20,759	$	24,682

Schedule of Deferred Revenue

Deferred revenue consisted of the following (in thousands):

	March 31, 2023		December 31, 2022
Deferred revenue:
Product	$	8,055	$	8,814
Service	17,590		18,057
Distribution rights	699		932
Total deferred revenue	26,344		27,803
Less: current portion of deferred revenue	(23,949)		(24,734)
Noncurrent portion of deferred revenue	$	2,395	$	3,069

Other Noncurrent Liabilities

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

	March 31, 2023		December 31, 2022
Accrued interest, noncurrent portion	$	363	$	96
Asset retirement obligation	1,082		1,057
Other accrued costs	621		629
Total other-long term liabilities	$	2,066	$	1,782