Activity in Inventory Reserve Allowance (Detail) (Inventory Valuation Reserve, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Inventory Valuation Reserve
Schedule of Inventory [Line Items]
Beginning Balance	$ 58	$ 231	$ 82
Charged to Expense	947	765	1,047
Write-Offs and Other	967	938	898
Ending Balance	$ 38	$ 58	$ 231