Nature of Business and Basis of Presentation (Details)	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
significant customer revenue percentage	90.00%	80.00%
POSCO Energy [Member]
Common stock ownership percentage	16.00%
significant customer revenue percentage	69.00%	64.00%
Dominion Bridgeport FuelCell Park [Member]
significant customer revenue percentage	16.00%	0.00%
U.S. Government [Member]
significant customer revenue percentage	5.00%
Logan Energy [Member]
significant customer revenue percentage	0.00%	11.00%