Inventories
 6 Months Ended
Apr. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories
The components of inventory at April 30, 2013 and October 31, 2012 consisted of the following:
 
 
April 30,
2013
 
October 31,
2012
Raw materials
$
20,385

 
$
17,683

Work-in-process (1)
29,486

 
30,018

Net Inventory
$
49,871

 
$
47,701


(1)
Work-in-process includes the standard components of inventory used to build the typical modules or stack components that are intended to be used in future power plant orders. Included in Work-in-process as of April 30, 2013 and October 31, 2012 is $2.9 million and $11.3 million, respectively, of completed standard components ready to be incorporated into power plants and deployed upon receipt of customer orders.

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 fuel cell stacks, which are subcomponents of a power plant. Work in process also includes costs related to modules which have not yet been placed into production for a particular commercial customer contract.

Raw materials and work in process are net of valuation reserves of approximately $1.6 million and $2.4 million at April 30, 2013 and October 31, 2012, respectively.