Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Allowances for Accounts Receivable

The allowances for accounts receivable consisted of the following:

	June 30, 2021		December 31, 2020
Credit loss provision	$	32	$	66
Credit allowances		48		47
Total allowances	$	80	$	113

Summary of Allowance for credit losses

The following table summarizes the allowance for credit losses activity during the six months ended June 30, 2021:

Balance at December 31, 2020	$	66
Current period benefit for credit losses		(34	)
Balance at June 30, 2021	$	32

Summary of Inventories, Net

Inventories, net consisted of the following:

	June 30, 2021		December 31, 2020
Raw materials	$	5,646	$	5,315
Work-in-process		975		883
Finished goods		5,770		3,786
Inventories, net	$	12,391	$	9,984

Summary of Property and Equipment

Property and equipment consisted of the following:

	June 30, 2021			December 31, 2020
Building	$	6,868		$	6,868
Computers and office equipment		10,309			10,039
Manufacturing and test equipment		16,454			15,394
Furniture and fixtures		1,438			1,437
Leasehold improvements		2,998			2,973
Motor vehicles		20			20
Total property and equipment		38,087			36,731
Less: Accumulated depreciation and amortization		(27,467	)		(25,996	)
Land		1,770			1,770
Property and equipment, net	$	12,390		$	12,505

Summary of Accrued Liabilities

Accrued liabilities consisted of the following:

	June 30, 2021		December 31, 2020
Inventory receipts	$	3,482	$	3,049
Paid time off		1,547		1,028
Payroll and other employee benefits		1,646		1,083
Professional fees and contractors		405		316
Employee stock purchase plan		221		224
Operating leases		450		269
Warranties		284		285
Deferred revenues		305		242
Real estate taxes		156		155
Income and sales taxes		234		185
Customer refunds for estimated returns		205		146
Finance leases		75		68
Restructuring		60		15
Other		384		251
Total	$	9,454	$	7,316

Summary of Long-term Liabilities

Long-term liabilities consisted of the following:

	June 30, 2021		December 31, 2020
Operating leases	$	3,810	$	3,949
Deferred payroll taxes		243		243
Finance leases		117		96
Deferred revenue		65		76
Other		110		23
Total	$	4,345	$	4,387