Business Segments (Details Textual)	3 Months Ended		9 Months Ended			12 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 27, 2014 Country Customer Segment	Sep. 28, 2013 Country Customer Segment	Sep. 27, 2014 Customer Segment Country	Sep. 28, 2013 Segment Customer Country	Sep. 27, 2014 Maximum Accounts Receivable	Dec. 28, 2013 Maximum Accounts Receivable	Sep. 27, 2014 Maximum Geographic Concentration Risk Revenues	Sep. 27, 2014 Maximum Geographic Concentration Risk Revenues	Sep. 28, 2013 Maximum Customer Concentration Risk Revenues	Sep. 28, 2013 Maximum Customer Concentration Risk Revenues	Sep. 27, 2014 United States	Sep. 28, 2013 United States	Sep. 27, 2014 United States	Sep. 28, 2013 United States
Segment Reporting Information [Line Items]
Number of operating segments	1	1	1	1
Number of country accounted for more than ten percent of revenue	1	1	1	1
Percentage of revenues accounted											54.80%	58.50%	52.30%	53.30%
Number of customers accounted for more than ten percent of revenue	0	0	0	0
Number of customers accounted for more than ten percent of account receivable	0	0	0	0
Customer accounted, percentage					10.00%	10.00%	10.00%	10.00%	10.00%	10.00%