XML 22 R1.htm IDEA: XBRL DOCUMENT v3.24.4
Document and Entity Information - USD ($)
 12 Months Ended
Oct. 31, 2024
Dec. 23, 2024
Apr. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Oct. 31, 2024    
Document Transition Report false    
Entity File Number 1-14204    
Entity Registrant Name FUELCELL ENERGY, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 06-0853042    
Entity Address, Address Line One 3 Great Pasture Road    
Entity Address, City or Town Danbury    
Entity Address, State or Province CT    
Entity Address, Postal Zip Code 06810    
City Area Code 203    
Local Phone Number 825-6000    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol FCEL    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 424,996,599
Entity Common Stock, Shares Outstanding   20,449,715  
Auditor Name KPMG LLP    
Auditor Firm ID 185    
Auditor Location Philadelphia, Pennsylvania    
Entity Central Index Key 0000886128    
Amendment Flag false    
Current Fiscal Year End Date --10-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY