Goodwill and Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 30, 2013	Dec. 29, 2012
Schedule of Intangible Assets
Gross Carrying Amount	$ 960	$ 960
Accumulated Amortization	471	406
Net Carrying Amount	489	554
Patents [Member]
Schedule of Intangible Assets
Gross Carrying Amount	720	720
Accumulated Amortization	423	362
Net Carrying Amount	297	358
Customer Relations [Member]
Schedule of Intangible Assets
Gross Carrying Amount	240	240
Accumulated Amortization	48	44
Net Carrying Amount	$ 192	$ 196
Amortization Life	12 years 1 month 6 days

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant