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Inventories (Tables)
12 Months Ended
Dec. 29, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following (in thousands):
At Fiscal Year End
2018
 
2017
Components and parts
$
28,183

 
$
52,837

Work-in-process
9,458

 
15,983

Finished goods
339,981

 
504,968

Inventories
$
377,622

 
$
573,788