Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2012

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):

	December 31,
	2012		2011
Raw materials	$	7,629	$	4,542
Work in process	3,889		2,486
Finished goods	3,604		2,374
	$	15,122	$	9,402

Property and Equipment

Property and equipment consist of the following (in thousands):

	December 31,
	2012			2011
Clinical and manufacturing equipment	$	83,821		$	59,991
Computer hardware	22,706			19,096
Computer software	20,346			18,972
Furniture and fixtures	6,808			5,797
Leasehold improvements	12,388			4,588
Building	1,868			1,913
Land	1,162			1,162
Construction in progress	16,027			17,913
Total	165,126			129,432
Less: Accumulated depreciation and amortization	(85,935		)	(75,467		)
	$	79,191		$	53,965

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,
	2012		2011
Accrued payroll and benefits	$	39,621	$	41,827
Accrued sales rebate	8,333		8,358
Accrued sales tax and value added tax	5,253		7,052
Accrued sales and marketing expenses	4,088		3,508
Accrued warranty	4,050		3,177
Accrued accounts payable	2,866		3,048
Accrued professional fees	2,349		654
Unclaimed merger consideration	1,575		4,026
Accrued income taxes	572		426
Other	5,540		4,524
	$	74,247	$	76,600

Warranty accrual

Warranty accrual as of December 31, 2012 and 2011 consists of the following activity (in thousands):

Warranty accrual, December 31, 2010	$	2,607
Charged to cost of revenues	3,319
Assumed warranty from Cadent	340
Actual warranty expenditures	(3,089		)
Warranty accrual, December 31, 2011	3,177
Charged to cost of revenues	4,637
Actual warranty expenditures	(3,764		)
Warranty accrual, December 31, 2012	$	4,050