Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Inventories

Inventories consisted of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	6,862	$	7,023
Work-in-process		1,535		1,388
Finished goods		4,522		4,437
Inventories, net	$	12,919	$	12,848

Summary of Property and Equipment

Property and equipment consisted of the following:

	March 31, 2019			December 31, 2018
Building	$	6,372		$	6,351
Computers and office equipment		10,649			10,963
Manufacturing and test equipment		13,886			13,573
Furniture and fixtures		1,319			1,318
Leasehold improvements		1,556			1,529
Motor vehicles		20			20
Total property and equipment		33,802			33,754
Less: Accumulated depreciation and amortization		(23,832	)		(23,386	)
Land		1,770			1,770
Property and equipment, net	$	11,740		$	12,138

Summary of Accrued Liabilities

Accrued liabilities consisted of the following:

	March 31, 2019		December 31, 2018
Payroll, bonuses, and other employee benefits	$	1,406	$	1,409
Inventory receipts		1,356		1,396
Paid time off		985		936
Short-term obligations under operating leases		876		0
Warranties		384		339
Professional fees and contractors		290		346
Income and sales taxes		241		186
Real estate taxes		185		148
Employee stock purchase plan		143		343
Customer refunds for estimated returns		142		154
Deferred revenues		126		149
Short-term obligations under finance leases		80		91
Other		454		304
Total	$	6,668	$	5,801

Summary of Long-term Liabilities

Long-term liabilities consisted of the following:

	March 31, 2019		December 31, 2018
Finance leases	$	117	$	132
Operating leases		562		0
Deferred Rent		0		87
Other		189		162
Total	$	868	$	381