Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2011
Revenues (1):
Product sales	$ 145,071		$ 94,950		$ 103,007
Service agreements and license revenues	28,141		18,183		12,097
Advanced technologies contract revenues	14,446		7,470		7,466
Total revenues	187,658	[1]	120,603	[1]	122,570	[1]
Costs of revenues:
Cost of product sales	136,989		93,876		96,525
Cost of Services	29,683		19,045		30,825
Cost of advanced technologies contract revenues	13,864		7,237		7,830
Total costs of revenues	180,536		120,158		135,180
Gross profit (loss)	7,122		445		(12,610)
Operating expenses:
Administrative and selling expenses	21,218		18,220		16,299
Research and development expenses	15,717		14,354		16,768
Total operating expenses	36,935		32,574		33,067
Loss from operations	(29,813)		(32,129)		(45,677)
Interest expense	(3,973)		(2,304)		(2,578)
Income (loss) from equity investment	46		(645)		58
Impairment of equity Investment	0		(3,602)		0
License fee and royalty income	0		1,599		1,718
Other income (expense), net	(1,208)		1,244		1,047
Loss before redeemable preferred stock of subsidiary	(34,948)		(35,837)		(45,432)
Accretion of redeemable preferred stock of subsidiary	0		0		(525)
Loss before provision for income taxes	(34,948)		(35,837)		(45,957)
Provision for income taxes	(371)		(69)		(17)
Net loss	(35,319)		(35,906)		(45,974)
Net loss attributable to noncontrolling interest	961		411		261
Net loss attributable to FuelCell Energy, Inc.	(34,358)		(35,495)		(45,713)
Adjustment for Modification of Redeemable Preferred Stock of Subsidiary	0		0		(8,987)
Preferred stock dividends	(3,200)		(3,201)		(3,200)
Net loss to common shareholders	$ (37,558)		$ (38,696)		$ (57,900)
Net loss to common shareholders per share
Basic	$ (0.20)		$ (0.23)		$ (0.47)
Diluted	$ (0.20)	[2]	$ (0.23)	[2]	$ (0.47)	[2]
Weighted average shares outstanding
Basic	186,525,001		165,471,261		124,498,073
Diluted	186,525,001		165,471,261		124,498,073

[1] Includes revenue from a related party. Refer to Concentrations in note 1 to the financial statements.

[2] Due to the net loss to common shareholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. Potentially dilutive instruments include stock options, warrants, convertible preferred stock and convertible notes. At October 31, 2013, 2012 and 2011, there were options to purchase 3.2 million, 3.1 million and 3.3 million shares of common stock, respectively. On September 4, 2013, the Company entered into a co-marketing agreement with NRG for the marketing and sales of the Company's power plants which include the issuance of warrants to purchase up to 5.0 million shares of the Company's common stock. On January 13, 2011 we issued 10.2 million warrants in connection with a registered direct offering. Each warrant was exercisable for 1 share of common stock. The warrants had an exercise price of $2.29 per share and were exercisable beginning six months and one day after the initial closing date and expired in the fourth quarter of 2012.