Business Segments (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 29, 2012 Customer	Oct. 01, 2011 Customer	Sep. 29, 2012 country Customer	Oct. 01, 2011 Customer
Business segments (Additional Textual) [Abstract]
Company's sales accounted			53.50%	54.50%
Number of customers accounted for more than ten percent of revenue	0	0	0	0
Individual country accounted			0
Customer [Member]
Business Segments (Textual) [Abstract]
Customer accounted, total revenue	10.00%	10.00%	10.00%	10.00%