Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2022

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Allowances for Accounts Receivable

The allowances for accounts receivable consisted of the following:

	September 30, 2022		December 31, 2021
Credit loss provision	$	89	$	26
Credit allowances		54		38
Total allowances	$	143	$	64

Summary of Allowance for credit losses

The following table summarizes the allowance for credit losses activity during the nine months ended September 30, 2022:

Balance at December 31, 2021	$	26
Current period expense for credit losses		63
Balance at September 30, 2022	$	89

Summary of Inventories, Net

Inventories, net consisted of the following:

	September 30, 2022		December 31, 2021
Raw materials	$	7,430	$	6,171
Work-in-process		1,275		690
Finished goods		8,025		6,830
Inventories, net	$	16,730	$	13,691

Summary of Property and Equipment

Property and equipment consisted of the following:

	September 30, 2022			December 31, 2021
Building	$	6,922		$	6,892
Computers and office equipment		10,189			10,604
Manufacturing and test equipment		14,692			16,305
Furniture and fixtures		1,446			1,455
Leasehold improvements		1,965			3,021
Motor vehicles		20			20
Total property and equipment		35,234			38,297
Less: Accumulated depreciation and amortization		(26,704	)		(28,118	)
Land		1,770			1,770
Property and equipment, net	$	10,300		$	11,949

Summary of Accrued Liabilities

Accrued liabilities consisted of the following:

	September 30, 2022		December 31, 2021
Accrued receipts	$	3,230	$	4,302
Payroll and other employee benefits		2,822		2,266
Paid time off		1,343		1,284
Right of use assets		553		537
Employee stock purchase plan		471		253
Deferred revenues		441		538
Income and sales taxes		314		415
Warranties		309		257
Customer refunds for estimated returns		301		248
Professional fees and contractors		295		233
Real estate taxes		119		156
Restructuring		0		368
Other		420		260
Total	$	10,618	$	11,117

Summary of Long-term Liabilities

Long-term liabilities consisted of the following:

	September 30, 2022		December 31, 2021
Operating leases	$	3,252	$	3,600
Finance leases		60		92
Deferred revenue		190		181
Other		31		126
Total	$	3,533	$	3,999