Annual report pursuant to Section 13 and 15(d)

Segment Reporting - Sales by Customer (Details)

v3.20.4
Segment Reporting - Sales by Customer (Details) - Sales to major customers - Customer Concentration Risk
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Customer A    
Segment Reporting Information    
Concentration risk percentage 12.00% 19.00%
Customer B    
Segment Reporting Information    
Concentration risk percentage   11.00%