Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Inventories

Inventories are comprised of (in thousands):

	March 31, 2013		December 31, 2012
Raw materials	$	7,381	$	7,629
Work in process	3,196		3,889
Finished goods	4,865		3,604
	$	15,442	$	15,122

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2013		December 31, 2012
Accrued payroll and benefits	$	31,246	$	39,621
Accrued sales rebate	8,996		8,333
Accrued sales tax and value added tax	4,890		5,253
Accrued sales and marketing expenses	3,695		4,088
Accrued warranty	4,129		4,050
Accrued accounts payable	2,230		2,866
Accrued distributor expenses	2,300		1,800
Accrued professional fees	1,207		2,349
Unclaimed merger consideration	508		1,575
Accrued income taxes	595		572
Other	4,839		3,740
Total	$	64,635	$	74,247

Warranty Accrual

The following table reflects the change in our warranty accrual during the three months ended March 31, 2013 and 2012, respectively (in thousands):

	Three Months Ended March 31,
	2013			2012
Balance at beginning of period	$	4,050		$	3,177
Charged to cost of revenues	1,263			888
Actual warranty expenditures	(1,184		)	(914		)
Balance at end of period	$	4,129		$	3,151