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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 |  |  |  |

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