Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies

Schedule of changes in warranty reserves

	December 31,
	2014			2013
	(in thousands)
Balance, beginning of the year	$	5,662			$	4,942
Addition for new warranties issued	3,484				5,291
Addition from PSP acquisition	809				—
Settlements	(3,802		)		(5,580		)
Changes in estimate	(742		)		1,009
Balance, end of the year	$	5,411			$	5,662

Schedule of minimum lease commitments for property and equipment under operating lease agreements

Minimum lease commitments at December 31, 2014 for property and equipment under operating lease agreements (exclusive of renewal options) are payable as follows:

	Operating
	Leases
Payments due by period:	(in thousands)
2015	$	2,322
2016	2,423
2017	1,993
2018	1,224
2019	526
Thereafter	2,700
Total	$	11,188

Schedule of customers who accounted for more than 10% of our aggregate accounts receivable or net sales

	Accounts Receivable				Net Sales for the Year Ended
	Year ended December 31,				December 31,
Customer	2014		2013		2014		2013		2012
Customer A		*		*		15%		*		*
Customer B		20%		10%		11%		14%		*
Customer C		13%		11%		*		*		*
Customer D		*		23%		*		*		14%

* Less than 10% of aggregate accounts receivable or net sales.

Schedule of net accounts receivable balance by geographic location

	December 31,
	2014		2013
	(in thousands)
China	$	17,911		$	4,130
Korea	8,118			2,411
Thailand	6,324			2,041
Taiwan	5,838			427
Other	3,986			4,890
Asia Pacific	42,177			13,899
United States	13,139			8,369
EMEA and other	4,769			1,555
Total	$	60,085		$	23,823