Quarterly report pursuant to Section 13 or 15(d)

Business and Basis of Presentation - Additional Information (Details)

v3.20.2
Business and Basis of Presentation - Additional Information (Details)
$ in Thousands
 9 Months Ended
Sep. 27, 2020
USD ($)
Line
Dec. 29, 2020
USD ($)
Dec. 29, 2019
USD ($)
PNC Bank [Member] | Revolving Credit Facility [Member]      
Business And Nature Of Presentation [Line Items]      
Line of Credit Facility, Remaining Borrowing Capacity $ 30,464   $ 21,644
PNC Bank [Member] | Scenario Forecast [Member] | Revolving Credit Facility [Member]      
Business And Nature Of Presentation [Line Items]      
Line of Credit Facility, Remaining Borrowing Capacity   $ 21,644  
Minimum [Member]      
Business And Nature Of Presentation [Line Items]      
Number of manufacturing and assembly lines | Line 50