Inventories (Details) (USD $)	Oct. 31, 2012		Oct. 31, 2011
Inventories [Abstract]
Raw Materials	$ 17,683,000		$ 18,303,000
Work in Process	30,018,000	[1]	21,798,000	[1]
Inventory, Net	47,701,000		40,101,000
Completed Standard Component	11,300,000
Inventory Valuation Reserves	$ 2,400,000		$ 2,600,000

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