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Inventory (Tables)
 3 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Components of Inventory
The components of inventories are as follows, in thousands:
 
 
December 31,
2018
 
September 30,
2018
Purchased parts and raw materials
$
14,840

 
$
15,896

Work-in-process
6,311

 
6,067

Finished goods
2,657

 
2,747

 
$
23,808

 
$
24,710