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Business Segments (Details Textual)	3 Months Ended
	Mar. 29, 2014 Customer Country Segment	Mar. 30, 2013 Customer Segment Country
Business segments (Additional Textual) [Abstract]
Number of operating segments	1	1
Number of country accounted for more than ten percent of revenue	1	1
Number of customers accounted for more than ten percent of revenue	0	0
Number of customers accounted for more than ten percent of account receivable	1	0
Maximum | Revenues
Business Segments (Textual) [Abstract]
Customer accounted, percentage	10.00%	10.00%
Maximum | Accounts Receivable
Business Segments (Textual) [Abstract]
Customer accounted, percentage		10.00%
Minimum | Accounts Receivable
Business Segments (Textual) [Abstract]
Customer accounted, percentage	10.00%
United States
Business segments (Additional Textual) [Abstract]
Percentage of revenues accounted	45.60%	47.10%

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- Definition

Individual country accounted.

+ References

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- Definition

Number of customers accounted for more than ten percent of accounts receivable.

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Number of customers accounted for more than ten percent of revenue.

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- Definition

Share as a percentage to total sales.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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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.

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