v3.25.1
Nature of Business and Basis of Presentation (Details)
3 Months Ended 6 Months Ended
Dec. 27, 2024
USD ($)
Nov. 08, 2024
shares
Apr. 10, 2024
USD ($)
Apr. 30, 2025
USD ($)
$ / shares
shares
Jan. 31, 2025
shares
Apr. 30, 2024
USD ($)
shares
Apr. 30, 2025
USD ($)
$ / shares
shares
Apr. 30, 2024
USD ($)
shares
Nov. 07, 2024
shares
Oct. 31, 2024
USD ($)
shares
Jan. 31, 2024
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   22,776,193     22,776,193   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     1,000,000,000    
Preferred shares authorized | shares   250,000                    
Cash and cash equivalents, unrestricted       $ 116,061,000   $ 158,790,000 $ 116,061,000 $ 158,790,000   $ 148,133,000    
Investments - short-term       60,908,000     60,908,000     109,123,000    
Net proceeds from issuance of common stock             13,557,000 $ 5,892,000        
U.S. Treasury Securities                        
Nature of Business and Basis of Presentation                        
Investments - short-term       $ 60,900,000     $ 60,900,000     $ 109,100,000    
Common Stock                        
Nature of Business and Basis of Presentation                        
Common stock, shares outstanding (in shares) | shares       22,776,193 21,143,772 15,280,202 22,776,193 15,280,202   20,375,932 15,062,045 15,020,872
Shares sold during the period | shares       1,626,319 690,711 215,457            
Amended Open Market Sales Agreement                        
Nature of Business and Basis of Presentation                        
Aggregate offering price $ 405,000,000                      
Additional amount of offering price 200,000,000                      
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                        
Aggregate offering price     $ 300,000,000                  
Shares sold during the period | shares       1,600,000     2,300,000          
Average sale of stock price per share | $ / shares       $ 5     $ 6.25          
Gross proceeds from sale of common stock       $ 8,100,000     $ 14,500,000          
Net proceeds from issuance of common stock       7,700,000     13,600,000          
Sales commission       200,000     300,000          
Payments of fees       $ 200,000     600,000          
Groton Project                        
Nature of Business and Basis of Presentation                        
Contribution received under the Technical Improvement Plan             $ 4,000,000