Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2020

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, 2020		December 31, 2019
Credit loss provision	$	68	$	56
Credit allowances		43		48
Total allowances	$	111	$	104

Summary of Allowance for credit losses

The following table summarizes the allowance for credit losses activity during the nine months ended September 30, 2020:

Balance at December 31, 2019	$	56
Current period benefit for credit losses		(164	)
Recovery of amounts previously written off		176
Balance at September 30, 2020	$	68

Summary of Inventories, Net

Inventories, net consisted of the following:

	September 30, 2020		December 31, 2019
Raw materials	$	5,832	$	6,502
Work-in-process		966		913
Finished goods		3,492		4,520
Inventories, net	$	10,290	$	11,935

Summary of Property and Equipment

Property and equipment consisted of the following:

	September 30, 2020			December 31, 2019
Building	$	6,880		$	6,389
Computers and office equipment		9,966			9,847
Manufacturing and test equipment		15,398			14,192
Furniture and fixtures		1,440			1,314
Leasehold improvements		3,067			2,850
Motor vehicles		20			20
Total property and equipment		36,771			34,612
Less: Accumulated depreciation and amortization		(25,813	)		(24,397	)
Land		1,770			1,770
Property and equipment, net	$	12,728		$	11,985

Summary of Accrued Liabilities

Accrued liabilities consisted of the following:

	September 30, 2020		December 31, 2019
Inventory receipts	$	2,524	$	1,431
Payroll and other employee benefits		1,169		1,605
Paid time off		1,146		855
Employee stock purchase plan		419		228
Professional fees and contractors		416		246
Deferred revenues		255		241
Warranties		250		444
Operating leases		177		282
Income and sales taxes		182		133
Real estate taxes		116		152
Customer refunds for estimated returns		109		147
Finance leases		71		77
Restructuring		4		45
Short-term incentive plan		0		2,553
Leasehold improvements		0		702
Other		256		241
Total	$	7,094	$	9,382

Summary of Long-term Liabilities

Long-term liabilities consisted of the following:

	September 30, 2020		December 31, 2019
Operating leases	$	4,028	$	3,021
Deferred payroll taxes		318		0
Finance leases		111		164
Deferred revenue		83		119
Other		17		11
Total	$	4,557	$	3,315