Commitments and Contingencies (Tables)

9 Months Ended

Sep. 26, 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 September 26, 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 three months)	$	2,622
2015	10,307
2016	8,600
2017	7,795
2018	7,650
Thereafter	13,731
Total	$	50,705

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						Nine months ended
	September 26, 2014			September 27, 2013			September 26, 2014			September 27, 2013
Balance at beginning of period	$	3,532		$	3,228		$	3,606		$	4,292
Transfer to Aurora as part of the sale of discontinued operations	—			—			—			(939		)
Accrual for current period warranties	2,028			1,991			5,383			5,333
Warranty costs incurred	(1,629		)	(1,705		)	(5,058		)	(5,172		)
Balance at end of period	$	3,931		$	3,514		$	3,931		$	3,514