Business Segments - Additional Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018 Customer	Jul. 01, 2017 Customer	Jun. 30, 2018 Customer Segment	Jul. 01, 2017 Customer	Dec. 30, 2017 Customer
Segment Reporting Information [Line Items]
Number of operating segments | Segment			1
Customer Concentration Risk | Revenue, Total
Segment Reporting Information [Line Items]
Percentage of concentration risk	10.00%	10.00%	10.00%	10.00%
Number of customer accounted for total revenues and net accounts receivable	0	0	0	0
Customer Concentration Risk | Accounts Receivable
Segment Reporting Information [Line Items]
Percentage of concentration risk	10.00%	10.00%	10.00%		10.00%
Number of customer accounted for total revenues and net accounts receivable	0	0	0	0	0
United States | Customer Concentration Risk | Revenue, Total
Segment Reporting Information [Line Items]
Percentage of concentration risk	49.60%	58.80%	50.30%	56.60%
Other Than United States | Customer Concentration Risk | Revenue, Total
Segment Reporting Information [Line Items]
Percentage of concentration risk	50.40%	41.20%	49.70%	43.40%