Summary of Significant Accounting Policies - Activity of Product Warranty Liability Included in Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Balance at beginning of year	$ 286	$ 70	$ 25
Provisions for warranty costs	1,249	1,064	586
Claims paid	(1,445)	(848)	(541)
Balance at end of year	$ 90	$ 286	$ 70