Inventories (Details) (USD $)	Apr. 30, 2013		Oct. 31, 2012
Inventories [Abstract]
Raw materials	$ 20,385,000		$ 17,683,000
Work in process	29,486,000	[1]	30,018,000	[1]
Inventory, Net	49,871,000		47,701,000
Completed Standard Component	2,900,000		11,300,000
Inventory Valuation Reserves	$ 1,600,000		$ 2,400,000

[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.