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Nature of Business and Basis of Presentation (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013 weeks	Jun. 30, 2012
Nature of Business and Basis of Presentation (Textual) [Abstract]
Fiscal year reporting period			52/53 week
Number of weeks in fiscal quarter			13
Foreign currency transaction losses	$ 200	$ 100	$ 13	$ 300
Maximum period of delivery to customers under service contract arrangements			6 months

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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