Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Jul. 31, 2014		Jul. 31, 2013		Jul. 31, 2014		Jul. 31, 2013
Revenues (1):
Product sales	$ 32,315		$ 45,441		$ 94,482		$ 108,881
Service agreements and license revenues	7,078		3,706		19,215		12,783
Advanced technologies contract revenues	3,783		4,560		12,187		10,837
Total revenues	43,176	[1]	53,707	[1]	125,884	[1]	132,501	[1]
Costs of revenues:
Cost of product sales	29,308		41,523		88,944		103,950
Cost of service agreements and license revenues	6,629		3,427		17,546		13,816
Cost of advanced technologies contract revenues	3,278		4,235		11,623		10,210
Total costs of revenues	39,215		49,185		118,113		127,976
Gross profit	3,961		4,522		7,771		4,525
Operating expenses:
Administrative and selling expenses	5,569		5,203		16,169		16,071
Research and development expenses	4,392		3,913		13,945		11,315
Total costs and expenses	9,961		9,116		30,114		27,386
Loss from operations	(6,000)		(4,594)		(22,343)		(22,861)
Interest expense	(649)		(1,078)		(2,901)		(2,218)
Income from equity investment					0		46
Other income (expense), net	(399)		(162)		(8,480)		(267)
Loss before provision for income taxes	(7,048)		(5,834)		(33,724)		(25,300)
Provision for income taxes	(91)		20		(269)		(22)
Net Loss	(7,139)		(5,814)		(33,993)		(25,322)
Net loss attributable to noncontrolling interest	161		202		568		664
Net loss attributable to FuelCell Energy, Inc.	(6,978)		(5,612)		(33,425)		(24,658)
Preferred stock dividends	(800)		(800)		(2,400)		(2,400)
Net loss attributable to common shareholders	$ (7,778)		$ (6,412)		$ (35,825)		$ (27,058)
Loss per share basic and diluted
Net loss per share attributable to common shareholders	$ (0.03)		$ (0.03)		$ (0.15)		$ (0.14)
Weighted Average Number of Shares Outstanding, Basic and Diluted	258,178,826		192,051,578		233,933,636		190,006,331

[1] Includes revenue from a related party. Refer to Related Parties in Note 1 to the financial statements.