Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013		Mar. 31, 2012
Reconciliation of the changes in the Company's deferred revenue balance
Balance, beginning of period	$ 1,004	[1]	$ 1,014
Additions to deferral	269		148
Revenue recognized	(330)		(255)
Balance, end of period	$ 943		$ 907

[1] Derived from the consolidated audited financial statements included in our Annual Report filed on Form 10-K with the SEC for the year ended December 29, 2012.