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Geographic And Group Information (Geographic Revenue) (Details) (USD $)	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 54,905,000	$ 54,349,000
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	46,406,000	42,310,000
International Primarily European Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 8,499,000	$ 12,039,000

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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- Details

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