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Nature of Business and Basis of Presentation (Details)
 3 Months Ended
Dec. 27, 2024
USD ($)
Nov. 08, 2024
shares
Apr. 10, 2024
USD ($)
Jan. 31, 2025
USD ($)
$ / shares
shares
Nov. 07, 2024
shares
Oct. 31, 2024
USD ($)
shares
Jan. 31, 2024
USD ($)
shares
Oct. 31, 2023
shares
Nature of Business and Basis of Presentation                
Reverse stock split, conversion ratio   0.033            
Common stock, shares outstanding (in shares) | shares   20,375,932   21,143,772 611,278,662 20,375,932    
Common stock, shares authorized (in shares) | shares   1,000,000,000   1,000,000,000   1,000,000,000    
Preferred shares authorized | shares   250,000            
Cash and cash equivalents, unrestricted       $ 98,070,000   $ 148,133,000 $ 297,466,000  
Investments - short-term       110,298,000   109,123,000    
Aggregate offering price     $ 300,000,000          
U.S. Treasury Securities                
Nature of Business and Basis of Presentation                
Investments - short-term       $ 110,300,000   $ 109,100,000    
Common Stock                
Nature of Business and Basis of Presentation                
Common stock, shares outstanding (in shares) | shares       21,143,772   20,375,932 15,062,045 15,020,872
Shares sold during the period | shares       690,711        
Amended Open Market Sales Agreement                
Nature of Business and Basis of Presentation                
Aggregate offering price $ 405,000,000              
Amended Open Market Sales Agreement | Common Stock                
Nature of Business and Basis of Presentation                
Amount remaining under the amended sales agreement $ 204,922,876.65              
Jefferies LLC, B. Riley Securities, Inc., Barclays Capital Inc., BMO Capital Markets Corp., BofA Securities, Inc., Canacord Genuity LLC, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Loop Capital Markets LLC | Amended Open Market Sales Agreement                
Nature of Business and Basis of Presentation                
Sales commission       $ 100,000        
Jefferies LLC, B. Riley Securities, Inc., Barclays Capital Inc., BMO Capital Markets Corp., BofA Securities, Inc., Canacord Genuity LLC, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Loop Capital Markets LLC | Amended Open Market Sales Agreement | Common Stock                
Nature of Business and Basis of Presentation                
Aggregate offering price     $ 300,000,000          
Shares sold during the period | shares       700,000        
Average sale price per share for sales to date under the amended sales agreement | $ / shares       $ 9.19        
Gross proceeds from issuance of common stock to date under the amended sales agreement       $ 6,300,000        
Net proceeds from issuance of common stock to date under the amended sales agreement       5,900,000        
Payments of underwriting discounts and commissions       300,000        
Groton Project                
Nature of Business and Basis of Presentation                
Contribution received under the Technical Improvement Plan       $ 4,000,000