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Inventories
9 Months Ended
Jul. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories
The components of inventory as of July 31, 2016 and October 31, 2015 consisted of the following:
 
July 31,
2016
 
October 31,
2015
Raw materials
$
28,739

 
$
29,103

Work-in-process (1)
49,465

 
36,651

Inventories
$
78,204

 
$
65,754


(1)
Included in work-in-process as of July 31, 2016 and October 31, 2015 was $26.6 million and $13.3 million, respectively, of completed standard components.

Raw materials consist mainly of various nickel powders and steels, various other components used in producing cell stacks and purchased components for balance of plant. Work-in-process inventory is comprised of material, labor, and overhead costs incurred to build balance of plant components, fuel cell stacks and modules, which are subcomponents of a power plant.