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Stockholders' Equity (Details) - USD ($) |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 27, 2024 | Apr. 10, 2024 | Jul. 12, 2022 | Apr. 30, 2025 | Jan. 31, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024
Stockholders' Equity |  |  |  |  |  |  |  |
Net proceeds from issuance of common stock |  |  |  |  |  |  | $ 13,557,000 | $ 5,892,000
Common Stock |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Shares sold during the period |  |  |  | 1,626,319 | 690,711 | 215,457 |  |
2022 Open Market Sale Agreement | 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 |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Percentage of sales commission |  |  | 2.00% |  |  |  |  |
2022 Open Market Sale Agreement | Jefferies LLC and Barclays Capital Inc. |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Aggregate offering price |  | $ 300,000,000 |  |  |  |  |  |
2022 Open Market Sale Agreement | Maximum | 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 |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Shares sold during the period |  |  | 3,200,000 |  |  |  |  |
Amended Open Market Sales Agreement |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Aggregate offering price | $ 405,000,000 |  |  |  |  |  |  |
Amended Open Market Sales Agreement | 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 |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |
Shares sold during the period |  |  |  | 1,600,000 |  |  | 2,300,000 |
Percentage of sales commission | 2.00% |  |  |  |  |  |  |
Aggregate offering price |  | $ 300,000,000 |  |  |  |  |  |
Average sale price per share for sales to date under the amended sales agreement |  |  |  | $ 5 |  |  | $ 6.25 |
Gross proceeds from common stock issuance, net of fees |  |  |  | $ 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 |
Offering price |  |  |  | $ 190,400,000 |  |  | $ 190,400,000 |

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