Goodwill and Intangible Assets - Summary of Components of Gross and Net Intangible Asset (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jan. 03, 2015
Schedule of Intangible Assets
Gross Carrying Amount	$ 960	$ 960
Accumulated Amortization	684	676
Net Carrying Amount	276	284	[1]
Patents
Schedule of Intangible Assets
Gross Carrying Amount	720	720
Accumulated Amortization	600	600
Net Carrying Amount	$ 120	120
Remaining Amortization Period	Varies
Customer Relations
Schedule of Intangible Assets
Gross Carrying Amount	$ 240	240
Accumulated Amortization	84	76
Net Carrying Amount	$ 156	$ 164
Useful Lives	9 years 9 months

[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.