Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty accrual, beginning of period	$ 838	$ 698	$ 544
Provision for warranty costs	3,117	2,489	2,592
Warranty expenditures	(2,794)	(2,349)	(2,438)
Warranty accrual, end of period	$ 1,161	$ 838	$ 698