Summary of Significant Accounting Policies - Reconciliation of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2015		Sep. 27, 2014
Reconciliation of the changes in the Company's deferred revenue balance
Balance, beginning of period	$ 1,179	[1]	$ 1,133
Additions to deferral	1,068		1,095
Revenue recognized	(1,036)		(1,053)
Balance, end of period	$ 1,211		$ 1,175

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended January 3, 2015.