Commitments and Contingencies (Tables)

6 Months Ended

Jun. 27, 2014

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Under Non-cancelable Operating Leases

Future minimum lease payments under non-cancelable operating leases as of June 27, 2014, after giving effect to $0.3 million of future sublease income from Aurora, are as follows (in thousands):

Years ending December 31,
2014 (remaining six months)	$	5,264
2015	10,199
2016	8,531
2017	7,788
2018	7,661
Thereafter	13,738
Total	$	53,181

Summary of Warranty Accrual Included in Accrued Liabilities

Activity for the Company’s warranty accrual, which is included in accrued liabilities, is summarized below (in thousands):

	Three months ended						Six months ended
	June 27, 2014			June 28, 2013			June 27, 2014			June 28, 2013
Balance at beginning of period	$	3,659		$	3,270		$	3,606		$	4,292
Transfer to Aurora as part of the sale of discontinued operations	—			—						(939		)
Accrual for current period warranties	1,606			1,948			3,355			3,342
Warranty costs incurred	(1,733		)	(1,990		)	(3,429		)	(3,467		)
Balance at end of period	$	3,532		$	3,228		$	3,532		$	3,228