Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Apr. 30, 2014		Apr. 30, 2013		Apr. 30, 2014		Apr. 30, 2013
Revenues (1):
Product sales	$ 27,707		$ 34,375		$ 62,167		$ 63,440
Service agreements and license revenues	7,177		4,108		12,137		9,077
Advanced technologies contract revenues	3,390		3,953		8,404		6,277
Total revenues	38,274	[1]	42,436	[1]	82,708	[1]	78,794	[1]
Costs of revenues:
Cost of product sales	26,608		32,483		59,636		62,427
Cost of service agreements and license revenues	6,760		3,904		10,917		10,389
Cost of advanced technologies contract revenues	3,295		3,735		8,345		5,975
Total costs of revenues	36,663		40,122		78,898		78,791
Gross profit	1,611		2,314		3,810		3
Operating expenses:
Administrative and selling expenses	5,746		5,436		10,600		10,868
Research and development expenses	4,638		4,075		9,553		7,402
Total costs and expenses	10,384		9,511		20,153		18,270
Loss from operations	(8,773)		(7,197)		(16,343)		(18,267)
Interest expense	(891)		(574)		(2,252)		(1,140)
Income from equity investment					0		46
Other income (expense), net	(6,307)		177		(8,081)		(105)
Loss before provision for income taxes	(15,971)		(7,594)		(26,676)		(19,466)
Provision for income taxes	(68)		(35)		(178)		(42)
Net Loss	(16,039)		(7,629)		(26,854)		(19,508)
Net loss attributable to noncontrolling interest	196		264		407		462
Net loss attributable to FuelCell Energy, Inc.	(15,843)		(7,365)		(26,447)		(19,046)
Preferred stock dividends	(800)		(800)		(1,600)		(1,600)
Net loss attributable to common shareholders	$ (16,643)		$ (8,165)		$ (28,047)		$ (20,646)
Loss per share basic and diluted
Net loss per share attributable to common shareholders	$ (0.07)		$ (0.04)		$ (0.13)		$ (0.11)
Weighted Average Number of Shares Outstanding, Basic and Diluted	243,289,058		190,431,554		221,609,975		188,968,577

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