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Business Segments (Details Textual) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2013 Customer country Segment | Jun. 30, 2012 country Customer | Jun. 29, 2013 Customer country | Jun. 30, 2012 country Customer
Business segments (Additional Textual) [Abstract] |  |  |  |
Number of operating segments | 1 |  |  |
Number of customers accounted for more than ten percent of revenue | 0 | 0 | 0 | 0
Individual country accounted | 1 | 1 | 1 | 1
Company's sales accounted | 53.90% | 52.60% | 50.50% | 51.70%
Percentage of company sales to which no individual country accounted | 10.00% | 10.00% | 10.00% | 10.00%
Maximum |  |  |  |
Business Segments (Textual) [Abstract] |  |  |  |
Customer accounted, total revenue | 10.00% | 10.00% | 10.00% | 10.00%

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- Definition Individual country accounted. + References No definition available. + Details
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- Definition Number of customers accounted for more than ten percent of revenue. + References No definition available. + Details
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- Definition Percentage of company sales to which no individual country accounted. + References No definition available. + Details
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- Definition Share as a percentage to total sales. + References No definition available. + Details
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- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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