Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012		Oct. 01, 2011
Reconciliation of the changes in the Company's deferred revenue balance
Balance, beginning of period	$ 1,014	[1]	$ 1,002
Additions to deferral	680		823
Revenue recognized	(833)		(865)
Balance, end of period	$ 861		$ 960

[1] Derived from the audited consolidated financial statements included in the annual report filed on Form 10-K with the SEC for the year ended December 31, 2011.