Annual report pursuant to Section 13 and 15(d)

Concentration of Credit Risks - Narrative (Detail)

v3.20.1
Concentration of Credit Risks - Narrative (Detail) - Three largest customers - Customer Concentration Risk
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Sales    
Concentration Risk [Line Items]    
Concentration risk percentage 52.50% 50.70%
Accounts Receivable    
Concentration Risk [Line Items]    
Concentration risk percentage 42.00% 48.80%