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Inventories (Tables)
12 Months Ended
Dec. 28, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following (in thousands):
At Fiscal Year End
2019
 
2018
Components and parts
$
35,626

 
$
28,183

Work-in-process
11,034

 
9,458

Finished goods
405,618

 
339,981

Inventories
$
452,278

 
$
377,622