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Inventories (Tables)
 9 Months Ended
Jun. 27, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories Inventories, net are as follows:
 
 
June 27,
2020
 
September 28,
2019
Components, assemblies and parts
 
$
120,019

 
$
112,886

Customer projects in various stages of completion
 
41,121

 
39,534

Finished goods
 
16,070

 
14,779

Total inventories, net
 
$
177,210

 
$
167,199