Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 522	$ 469	$ 378
Deductions	765	494	1,986
Ending Balance	171	522	469
Inventory Reserves [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	231	82	594
Additions (Reductions) to Expenses	765	1,047	498
Deductions	938	898	1,010
Ending Balance	58	231	82
Deferred Tax Asset Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	2,691	3,647	4,520
Additions (Reductions) to Expenses	(415)	(279)	(186)
Deductions	2,598	(677)	(687)
Ending Balance	$ 4,874	$ 2,691	$ 3,647