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Inventories (Tables)
6 Months Ended
Apr. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventories
As of the dates indicated, inventories are comprised of the following (in thousands):
 
April 30,
2018
 
October 31,
2017
Raw materials
$
48,356

 
$
52,898

Work-in-process
13,253

 
18,623

Finished goods
165,733

 
185,488

Deferred cost of goods sold
55,161

 
61,340

 
282,503

 
318,349

Provision for excess and obsolescence
(51,165
)
 
(51,206
)
 
$
231,338

 
$
267,143