Quarterly report pursuant to Section 13 or 15(d)

Sales to Major Customers (Details)

v3.19.2
Sales to Major Customers (Details)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 29, 2018
Jun. 30, 2018
Jun. 29, 2019
USD ($)
customer
Jun. 30, 2018
customer
Segment Reporting, Asset Reconciling Item        
Number of major customers | customer     2 2
Sales Revenue, Net | Customer Concentration Risk | Major Customer One        
Segment Reporting, Asset Reconciling Item        
Percent of consolidated revenue 13.00% 14.00% 14.00% 15.00%
Sales Revenue, Net | Customer Concentration Risk | Major Customer Two        
Segment Reporting, Asset Reconciling Item        
Percent of consolidated revenue 14.00% 12.00% 13.00% 16.00%
Sales Revenue, Net | Customer Concentration Risk | Two Major Customers        
Segment Reporting, Asset Reconciling Item        
Accounts receivable from major customers | $     $ 44.6