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Nature of Business and Basis of Presentation (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012 | Sep. 28, 2013 weeks | Sep. 29, 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 | $ 0.4 | $ 0.1 | $ 0.4 | $ 0.4
Maximum period of delivery to customers under service contract arrangements |  |  | 6 months |

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894 + Details
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