Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of inventories

Inventories consisted of the following at June 30, 2013 and December 31, 2012:

	June 30,		December 31,
	2013		2012
Raw materials	$	9,627	$	12,226
Work in process		1,025		789
Finished goods		5,456		4,558
Inventories, net	$	16,108	$	17,573

Summary of property and equipment

Property and equipment consists of the following at June 30, 2013 and December 31, 2012:

	June 30,			December 31,
	2013			2012
Building	$	6,207		$	6,207
Computers and office equipment		10,434			9,968
Manufacturing and test equipment		10,181			9,495
Furniture and fixtures		1,209			1,256
Leasehold improvements		600			519
Motor vehicles		150			150
Total property and equipment		28,781			27,595
Less: Accumulated depreciation and amortization		(15,880	)		(14,590	)
Land		1,770			1,770
Property and equipment, net	$	14,671		$	14,775

Summary of accrued liabilities

Accrued liabilities consist of the following at June 30, 2013 and December 31, 2012:

	June 30,		December 31,
	2013		2012
Inventory receipts	$	1,419	$	2,191
Payroll, bonuses, and other employee benefits		1,245		859
Paid time off		1,164		1,067
Employee stock purchase plan		293		276
Warranties		244		270
Deferred liabilities		226		127
Professional fees		177		268
Real estate taxes		165		170
Restructuring		75		0
Sales tax		69		156
Other		674		515
Total	$	5,751	$	5,899

Summary of long-term liabilities

Long-term liabilities consist of the following:

	June 30,		December 31,
	2013		2012
Executive deferred compensation plan	$	1,718	$	1,652
Reserve for uncertain tax positions		842		842
Deferred rent		166		166
Deferred revenues		54		74
Long-term obligations under capital leases		1		2
	$	2,781	$	2,736