Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Activity related to allowance for doubtful accounts
Balance at beginning of period	$ 88	$ 90	$ 65
Provision	0	0	32
Deduction	1	2	7
Balance at end of period	$ 87	$ 88	$ 90